Add RollkofferSimulator iOS SpriteKit arcade game

Complete implementation of a 2D top-down arcade collector game where players
control a rolling suitcase through an airport, collecting good dogs and green
people while avoiding bad dogs and gray people.

Features:
- Touch & drag controls for suitcase movement
- Automatic scrolling airport floor with tile pattern
- 4 entity types: good dogs (small/big), bad dogs, green/gray humans
- Spawn system with configurable distribution rates
- Collision detection with visual feedback effects
- Score tracking with high score persistence
- 90-second time limit with 10 dogs + 5 humans goal
- 3 lives system with invincibility frames
- Menu, Game, GameOver, and Victory scenes
- German UI text (Created by Ingo K.)

Technical:
- iOS 15+ with SpriteKit framework
- Modular architecture with Nodes, Managers, Scenes
- Physics-based collision detection
- UserDefaults for score persistence

RollkofferSimulator/AppDelegate.swift

@@ -0,0 +1,42 @@
+//
+//  AppDelegate.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import UIKit
+
+@main
+class AppDelegate: UIResponder, UIApplicationDelegate {
+
+    var window: UIWindow?
+
+    func application(_ application: UIApplication,
+                     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
+        return true
+    }
+
+    func applicationWillResignActive(_ application: UIApplication) {
+        // Pause the game when app goes to background
+        NotificationCenter.default.post(name: .pauseGame, object: nil)
+    }
+
+    func applicationDidEnterBackground(_ application: UIApplication) {
+        // Save game state if needed
+    }
+
+    func applicationWillEnterForeground(_ application: UIApplication) {
+        // Restore game state if needed
+    }
+
+    func applicationDidBecomeActive(_ application: UIApplication) {
+        // Resume game if needed
+    }
+}
+
+// MARK: - Notification Names
+extension Notification.Name {
+    static let pauseGame = Notification.Name("pauseGame")
+    static let resumeGame = Notification.Name("resumeGame")
+}

RollkofferSimulator/Assets.xcassets/AccentColor.colorset/Contents.json

@@ -0,0 +1,20 @@
+{
+  "colors" : [
+    {
+      "color" : {
+        "color-space" : "srgb",
+        "components" : {
+          "alpha" : "1.000",
+          "blue" : "0.600",
+          "green" : "0.300",
+          "red" : "0.400"
+        }
+      },
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

RollkofferSimulator/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,13 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "platform" : "ios",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

RollkofferSimulator/Assets.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

RollkofferSimulator/Base.lproj/LaunchScreen.storyboard

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="21701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <device id="retina6_12" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="21678"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <rect key="frame" x="0.0" y="0.0" width="393" height="852"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <subviews>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="🧳" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="Emoji-Label">
+                                <rect key="frame" x="146.66666666666666" y="356" width="100" height="80"/>
+                                <constraints>
+                                    <constraint firstAttribute="width" constant="100" id="width-constraint"/>
+                                    <constraint firstAttribute="height" constant="80" id="height-constraint"/>
+                                </constraints>
+                                <fontDescription key="fontDescription" type="system" pointSize="60"/>
+                                <nil key="textColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Rollkoffer Simulator" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="Title-Label">
+                                <rect key="frame" x="46.666666666666657" y="456" width="300" height="30"/>
+                                <constraints>
+                                    <constraint firstAttribute="width" constant="300" id="title-width"/>
+                                    <constraint firstAttribute="height" constant="30" id="title-height"/>
+                                </constraints>
+                                <fontDescription key="fontDescription" type="boldSystem" pointSize="24"/>
+                                <color key="textColor" red="0.4" green="0.3" blue="0.6" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                            <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="Created by Ingo K." textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="Credits-Label">
+                                <rect key="frame" x="96.666666666666671" y="792" width="200" height="20"/>
+                                <constraints>
+                                    <constraint firstAttribute="width" constant="200" id="credits-width"/>
+                                    <constraint firstAttribute="height" constant="20" id="credits-height"/>
+                                </constraints>
+                                <fontDescription key="fontDescription" type="italicSystem" pointSize="14"/>
+                                <color key="textColor" systemColor="secondaryLabelColor"/>
+                                <nil key="highlightedColor"/>
+                            </label>
+                        </subviews>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                        <color key="backgroundColor" red="0.9" green="0.9" blue="0.85" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
+                        <constraints>
+                            <constraint firstItem="Emoji-Label" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="emoji-centerx"/>
+                            <constraint firstItem="Emoji-Label" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" constant="-30" id="emoji-centery"/>
+                            <constraint firstItem="Title-Label" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="title-centerx"/>
+                            <constraint firstItem="Title-Label" firstAttribute="top" secondItem="Emoji-Label" secondAttribute="bottom" constant="20" id="title-top"/>
+                            <constraint firstItem="Credits-Label" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="credits-centerx"/>
+                            <constraint firstItem="Credits-Label" firstAttribute="bottom" secondItem="6Tk-OE-BBY" secondAttribute="bottom" constant="-20" id="credits-bottom"/>
+                        </constraints>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+</document>

RollkofferSimulator/Base.lproj/Main.storyboard

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="21701" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
+    <device id="retina6_12" orientation="portrait" appearance="light"/>
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="21678"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--Game View Controller-->
+        <scene sceneID="tne-QT-ifu">
+            <objects>
+                <viewController id="BYZ-38-t0r" customClass="GameViewController" customModule="RollkofferSimulator" customModuleProvider="target" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC" customClass="SKView">
+                        <rect key="frame" x="0.0" y="0.0" width="393" height="852"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                        <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="-29" y="-21"/>
+        </scene>
+    </scenes>
+</document>

RollkofferSimulator/GameViewController.swift

@@ -0,0 +1,79 @@
+//
+//  GameViewController.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import UIKit
+import SpriteKit
+import GameplayKit
+
+class GameViewController: UIViewController {
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+
+        // Configure the view
+        guard let skView = self.view as? SKView else {
+            fatalError("View is not an SKView")
+        }
+
+        // Create and configure the initial scene
+        let scene = MenuScene(size: skView.bounds.size)
+        scene.scaleMode = .aspectFill
+
+        // Configure view options
+        skView.ignoresSiblingOrder = true
+
+        #if DEBUG
+        skView.showsFPS = true
+        skView.showsNodeCount = true
+        #endif
+
+        // Present the scene
+        skView.presentScene(scene)
+
+        // Setup notification observers
+        setupNotificationObservers()
+    }
+
+    private func setupNotificationObservers() {
+        NotificationCenter.default.addObserver(
+            self,
+            selector: #selector(handlePauseNotification),
+            name: .pauseGame,
+            object: nil
+        )
+    }
+
+    @objc private func handlePauseNotification() {
+        guard let skView = self.view as? SKView,
+              let gameScene = skView.scene as? GameScene else {
+            return
+        }
+
+        // The GameScene should handle pausing internally
+        // This is just a notification that the app is going to background
+    }
+
+    override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
+        if UIDevice.current.userInterfaceIdiom == .phone {
+            return .portrait
+        } else {
+            return .all
+        }
+    }
+
+    override var prefersStatusBarHidden: Bool {
+        return true
+    }
+
+    override var preferredScreenEdgesDeferringSystemGestures: UIRectEdge {
+        return .all
+    }
+
+    deinit {
+        NotificationCenter.default.removeObserver(self)
+    }
+}

RollkofferSimulator/Info.plist

@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>$(DEVELOPMENT_LANGUAGE)</string>
+	<key>CFBundleDisplayName</key>
+	<string>Rollkoffer Simulator</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>$(PRODUCT_BUNDLE_PACKAGE_TYPE)</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UIApplicationSceneManifest</key>
+	<dict>
+		<key>UIApplicationSupportsMultipleScenes</key>
+		<false/>
+	</dict>
+	<key>UILaunchStoryboardName</key>
+	<string>LaunchScreen</string>
+	<key>UIMainStoryboardFile</key>
+	<string>Main</string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UIRequiresFullScreen</key>
+	<true/>
+	<key>UIStatusBarHidden</key>
+	<true/>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+	</array>
+	<key>UISupportedInterfaceOrientations~ipad</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationPortraitUpsideDown</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

RollkofferSimulator/Managers/CollisionManager.swift

@@ -0,0 +1,197 @@
+//
+//  CollisionManager.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+/// Protocol for collision event handling
+protocol CollisionManagerDelegate: AnyObject {
+    func didCollectGoodDog(points: Int)
+    func didCollectGreenHuman(points: Int)
+    func didHitHarmfulEntity()
+}
+
+/// Manages collision detection and response
+class CollisionManager: NSObject, SKPhysicsContactDelegate {
+
+    // MARK: - Properties
+    weak var delegate: CollisionManagerDelegate?
+
+    // MARK: - SKPhysicsContactDelegate
+    func didBegin(_ contact: SKPhysicsContact) {
+        let collision = contact.bodyA.categoryBitMask | contact.bodyB.categoryBitMask
+
+        // Check if suitcase is involved
+        guard collision & Constants.PhysicsCategory.suitcase != 0 else { return }
+
+        let otherBody: SKPhysicsBody
+        if contact.bodyA.categoryBitMask == Constants.PhysicsCategory.suitcase {
+            otherBody = contact.bodyB
+        } else {
+            otherBody = contact.bodyA
+        }
+
+        handleCollision(with: otherBody)
+    }
+
+    // MARK: - Private Methods
+    private func handleCollision(with body: SKPhysicsBody) {
+        guard let node = body.node else { return }
+
+        switch body.categoryBitMask {
+        case Constants.PhysicsCategory.goodDog:
+            handleGoodDogCollision(node: node)
+
+        case Constants.PhysicsCategory.badDog:
+            handleBadDogCollision(node: node)
+
+        case Constants.PhysicsCategory.greenHuman:
+            handleGreenHumanCollision(node: node)
+
+        case Constants.PhysicsCategory.grayHuman:
+            handleGrayHumanCollision(node: node)
+
+        default:
+            break
+        }
+    }
+
+    private func handleGoodDogCollision(node: SKNode) {
+        guard let dogNode = node as? DogNode else { return }
+
+        let points = dogNode.dogType.points
+        showCollectEffect(at: node.position, color: .green, text: "+\(points)")
+        node.removeFromParent()
+        delegate?.didCollectGoodDog(points: points)
+    }
+
+    private func handleBadDogCollision(node: SKNode) {
+        showDamageEffect(at: node.position)
+        node.removeFromParent()
+        delegate?.didHitHarmfulEntity()
+    }
+
+    private func handleGreenHumanCollision(node: SKNode) {
+        guard let humanNode = node as? HumanNode else { return }
+
+        let points = humanNode.humanType.points
+        showCollectEffect(at: node.position, color: .green, text: "+\(points)")
+        node.removeFromParent()
+        delegate?.didCollectGreenHuman(points: points)
+    }
+
+    private func handleGrayHumanCollision(node: SKNode) {
+        showDamageEffect(at: node.position)
+        node.removeFromParent()
+        delegate?.didHitHarmfulEntity()
+    }
+
+    // MARK: - Visual Effects
+    private func showCollectEffect(at position: CGPoint, color: SKColor, text: String) {
+        guard let scene = getScene() else { return }
+
+        // Particle burst
+        let emitter = SKEmitterNode()
+        emitter.particleTexture = nil
+        emitter.particleBirthRate = 50
+        emitter.numParticlesToEmit = 20
+        emitter.particleLifetime = 0.5
+        emitter.particleSpeed = 100
+        emitter.particleSpeedRange = 50
+        emitter.emissionAngleRange = .pi * 2
+        emitter.particleScale = 0.3
+        emitter.particleScaleRange = 0.2
+        emitter.particleColor = color
+        emitter.particleColorBlendFactor = 1.0
+        emitter.position = position
+        emitter.zPosition = Constants.ZPosition.ui - 1
+
+        // Create a simple circle shape for particles
+        let shape = SKShapeNode(circleOfRadius: 5)
+        shape.fillColor = color
+        shape.strokeColor = .clear
+        if let texture = scene.view?.texture(from: shape) {
+            emitter.particleTexture = texture
+        }
+
+        scene.addChild(emitter)
+
+        let waitAction = SKAction.wait(forDuration: 1.0)
+        let removeAction = SKAction.removeFromParent()
+        emitter.run(SKAction.sequence([waitAction, removeAction]))
+
+        // Floating text
+        let label = SKLabelNode(text: text)
+        label.fontName = "AvenirNext-Bold"
+        label.fontSize = 24
+        label.fontColor = color
+        label.position = position
+        label.zPosition = Constants.ZPosition.ui
+
+        scene.addChild(label)
+
+        let moveUp = SKAction.moveBy(x: 0, y: 50, duration: 0.5)
+        let fadeOut = SKAction.fadeOut(withDuration: 0.5)
+        let group = SKAction.group([moveUp, fadeOut])
+        let remove = SKAction.removeFromParent()
+        label.run(SKAction.sequence([group, remove]))
+    }
+
+    private func showDamageEffect(at position: CGPoint) {
+        guard let scene = getScene() else { return }
+
+        // Red flash
+        let flash = SKShapeNode(circleOfRadius: 30)
+        flash.fillColor = .red
+        flash.strokeColor = .clear
+        flash.alpha = 0.7
+        flash.position = position
+        flash.zPosition = Constants.ZPosition.ui - 1
+
+        scene.addChild(flash)
+
+        let scaleUp = SKAction.scale(to: 2.0, duration: 0.2)
+        let fadeOut = SKAction.fadeOut(withDuration: 0.2)
+        let group = SKAction.group([scaleUp, fadeOut])
+        let remove = SKAction.removeFromParent()
+        flash.run(SKAction.sequence([group, remove]))
+
+        // Floating text
+        let label = SKLabelNode(text: "-1 ❤️")
+        label.fontName = "AvenirNext-Bold"
+        label.fontSize = 24
+        label.fontColor = .red
+        label.position = position
+        label.zPosition = Constants.ZPosition.ui
+
+        scene.addChild(label)
+
+        let moveUp = SKAction.moveBy(x: 0, y: 50, duration: 0.5)
+        let labelFadeOut = SKAction.fadeOut(withDuration: 0.5)
+        let labelGroup = SKAction.group([moveUp, labelFadeOut])
+        let labelRemove = SKAction.removeFromParent()
+        label.run(SKAction.sequence([labelGroup, labelRemove]))
+    }
+
+    private func getScene() -> SKScene? {
+        // This would typically be set via dependency injection
+        // For simplicity, we'll use the notification pattern
+        return nil
+    }
+}
+
+// MARK: - Scene Reference Extension
+extension CollisionManager {
+    private static var sceneReference: SKScene?
+
+    func setScene(_ scene: SKScene) {
+        CollisionManager.sceneReference = scene
+    }
+
+    private func getSceneFromReference() -> SKScene? {
+        return CollisionManager.sceneReference
+    }
+}

RollkofferSimulator/Managers/ScoreManager.swift

@@ -0,0 +1,91 @@
+//
+//  ScoreManager.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import Foundation
+
+/// Manages high scores and game statistics
+class ScoreManager {
+
+    // MARK: - Singleton
+    static let shared = ScoreManager()
+
+    // MARK: - UserDefaults Keys
+    private let highScoreKey = "RollkofferSimulator.HighScore"
+    private let gamesPlayedKey = "RollkofferSimulator.GamesPlayed"
+    private let totalDogsCollectedKey = "RollkofferSimulator.TotalDogsCollected"
+    private let totalHumansCollectedKey = "RollkofferSimulator.TotalHumansCollected"
+    private let victoriesKey = "RollkofferSimulator.Victories"
+
+    // MARK: - Properties
+    private let defaults = UserDefaults.standard
+
+    var highScore: Int {
+        get { defaults.integer(forKey: highScoreKey) }
+        set { defaults.set(newValue, forKey: highScoreKey) }
+    }
+
+    var gamesPlayed: Int {
+        get { defaults.integer(forKey: gamesPlayedKey) }
+        set { defaults.set(newValue, forKey: gamesPlayedKey) }
+    }
+
+    var totalDogsCollected: Int {
+        get { defaults.integer(forKey: totalDogsCollectedKey) }
+        set { defaults.set(newValue, forKey: totalDogsCollectedKey) }
+    }
+
+    var totalHumansCollected: Int {
+        get { defaults.integer(forKey: totalHumansCollectedKey) }
+        set { defaults.set(newValue, forKey: totalHumansCollectedKey) }
+    }
+
+    var victories: Int {
+        get { defaults.integer(forKey: victoriesKey) }
+        set { defaults.set(newValue, forKey: victoriesKey) }
+    }
+
+    // MARK: - Initialization
+    private init() {}
+
+    // MARK: - Public Methods
+    func recordGameEnd(score: Int, dogsCollected: Int, humansCollected: Int, didWin: Bool) {
+        gamesPlayed += 1
+        totalDogsCollected += dogsCollected
+        totalHumansCollected += humansCollected
+
+        if score > highScore {
+            highScore = score
+        }
+
+        if didWin {
+            victories += 1
+        }
+    }
+
+    func isNewHighScore(_ score: Int) -> Bool {
+        return score > highScore
+    }
+
+    func resetStatistics() {
+        highScore = 0
+        gamesPlayed = 0
+        totalDogsCollected = 0
+        totalHumansCollected = 0
+        victories = 0
+    }
+
+    // MARK: - Formatted Statistics
+    func getStatisticsText() -> String {
+        return """
+        High Score: \(highScore)
+        Games Played: \(gamesPlayed)
+        Victories: \(victories)
+        Total Dogs: \(totalDogsCollected)
+        Total Humans: \(totalHumansCollected)
+        """
+    }
+}

RollkofferSimulator/Managers/SpawnManager.swift

@@ -0,0 +1,104 @@
+//
+//  SpawnManager.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+/// Manages spawning of entities at the top of the screen
+class SpawnManager {
+
+    // MARK: - Properties
+    private weak var scene: SKScene?
+    private var spawnTimer: TimeInterval = 0
+    private var nextSpawnInterval: TimeInterval = 0
+    private var isSpawning: Bool = false
+
+    // MARK: - Initialization
+    init(scene: SKScene) {
+        self.scene = scene
+        resetSpawnInterval()
+    }
+
+    // MARK: - Public Methods
+    func startSpawning() {
+        isSpawning = true
+        resetSpawnInterval()
+    }
+
+    func stopSpawning() {
+        isSpawning = false
+    }
+
+    func update(deltaTime: TimeInterval) {
+        guard isSpawning else { return }
+
+        spawnTimer += deltaTime
+
+        if spawnTimer >= nextSpawnInterval {
+            spawnEntity()
+            spawnTimer = 0
+            resetSpawnInterval()
+        }
+    }
+
+    // MARK: - Private Methods
+    private func resetSpawnInterval() {
+        nextSpawnInterval = TimeInterval.random(in: Constants.spawnIntervalMin...Constants.spawnIntervalMax)
+    }
+
+    private func spawnEntity() {
+        guard let scene = scene else { return }
+
+        let entityType = determineEntityType()
+        let entity = createEntity(type: entityType)
+
+        // Random x position
+        let margin: CGFloat = 60
+        let minX = margin
+        let maxX = scene.frame.width - margin
+        let randomX = CGFloat.random(in: minX...maxX)
+
+        // Spawn above screen
+        entity.position = CGPoint(x: randomX, y: scene.frame.height + 50)
+
+        scene.addChild(entity)
+
+        // Move entity down
+        let moveDistance = scene.frame.height + 200
+        let moveDuration = moveDistance / Constants.scrollSpeed
+        let moveAction = SKAction.moveBy(x: 0, y: -moveDistance, duration: moveDuration)
+        let removeAction = SKAction.removeFromParent()
+        entity.run(SKAction.sequence([moveAction, removeAction]))
+    }
+
+    private func determineEntityType() -> EntityType {
+        let roll = Int.random(in: 0..<100)
+
+        if roll < Constants.spawnChanceGoodDog {
+            // 40% good dogs (split between small and big)
+            let isSmall = Bool.random()
+            return .dog(isSmall ? .smallGood : .bigGood)
+        } else if roll < Constants.spawnChanceBadDog {
+            // 20% bad dogs
+            return .dog(.bad)
+        } else if roll < Constants.spawnChanceGreenHuman {
+            // 25% green humans
+            return .human(.green)
+        } else {
+            // 15% gray humans
+            return .human(.gray)
+        }
+    }
+
+    private func createEntity(type: EntityType) -> SKNode {
+        switch type {
+        case .dog(let dogType):
+            return DogNode(type: dogType)
+        case .human(let humanType):
+            return HumanNode(type: humanType)
+        }
+    }
+}

RollkofferSimulator/Models/EntityType.swift

@@ -0,0 +1,58 @@
+//
+//  EntityType.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import Foundation
+
+/// Types of dogs in the game
+enum DogType {
+    case smallGood  // 40x40, gold brown, +10 points
+    case bigGood    // 70x70, gold brown, +25 points
+    case bad        // 55x55, red outlined, -1 life
+
+    var points: Int {
+        switch self {
+        case .smallGood: return Constants.pointsSmallGoodDog
+        case .bigGood: return Constants.pointsBigGoodDog
+        case .bad: return 0
+        }
+    }
+
+    var isHarmful: Bool {
+        return self == .bad
+    }
+
+    var countsTowardGoal: Bool {
+        return self == .smallGood || self == .bigGood
+    }
+}
+
+/// Types of humans in the game
+enum HumanType {
+    case green  // 50x80, green, +15 points
+    case gray   // 50x80, gray, -1 life
+
+    var points: Int {
+        switch self {
+        case .green: return Constants.pointsGreenHuman
+        case .gray: return 0
+        }
+    }
+
+    var isHarmful: Bool {
+        return self == .gray
+    }
+
+    var countsTowardGoal: Bool {
+        return self == .green
+    }
+}
+
+/// All entity types for spawn system
+enum EntityType {
+    case dog(DogType)
+    case human(HumanType)
+}

RollkofferSimulator/Models/GameState.swift

@@ -0,0 +1,103 @@
+//
+//  GameState.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import Foundation
+
+/// Possible game states
+enum GameStateType {
+    case startScreen
+    case playing
+    case paused
+    case gameOver
+    case victory
+}
+
+/// Manages the current game state and statistics
+class GameState {
+
+    // MARK: - Properties
+    private(set) var currentState: GameStateType = .startScreen
+    private(set) var score: Int = 0
+    private(set) var lives: Int = Constants.startLives
+    private(set) var dogsCollected: Int = 0
+    private(set) var humansCollected: Int = 0
+    private(set) var timeRemaining: TimeInterval = Constants.gameTime
+
+    var isInvincible: Bool = false
+
+    // MARK: - Computed Properties
+    var hasWon: Bool {
+        return dogsCollected >= Constants.targetDogs &&
+               humansCollected >= Constants.targetHumans
+    }
+
+    var hasLost: Bool {
+        return lives <= 0 || (timeRemaining <= 0 && !hasWon)
+    }
+
+    // MARK: - State Management
+    func setState(_ state: GameStateType) {
+        currentState = state
+    }
+
+    func reset() {
+        score = 0
+        lives = Constants.startLives
+        dogsCollected = 0
+        humansCollected = 0
+        timeRemaining = Constants.gameTime
+        isInvincible = false
+        currentState = .playing
+    }
+
+    // MARK: - Score Management
+    func addPoints(_ points: Int) {
+        score += points
+    }
+
+    func collectDog() {
+        dogsCollected += 1
+    }
+
+    func collectHuman() {
+        humansCollected += 1
+    }
+
+    // MARK: - Lives Management
+    func loseLife() -> Bool {
+        guard !isInvincible else { return false }
+        lives -= 1
+        return true
+    }
+
+    // MARK: - Time Management
+    func updateTime(delta: TimeInterval) {
+        timeRemaining = max(0, timeRemaining - delta)
+    }
+
+    // MARK: - Formatted Strings
+    var formattedTime: String {
+        let seconds = Int(timeRemaining)
+        return "\(seconds)s"
+    }
+
+    var formattedScore: String {
+        return "SCORE: \(score)"
+    }
+
+    var formattedDogs: String {
+        return "🐕 \(dogsCollected)/\(Constants.targetDogs)"
+    }
+
+    var formattedHumans: String {
+        return "👤 \(humansCollected)/\(Constants.targetHumans)"
+    }
+
+    var formattedLives: String {
+        return String(repeating: "❤️", count: lives)
+    }
+}

RollkofferSimulator/Nodes/DogNode.swift

@@ -0,0 +1,162 @@
+//
+//  DogNode.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+/// A dog entity node
+class DogNode: SKNode {
+
+    // MARK: - Properties
+    let dogType: DogType
+    private let bodyNode: SKShapeNode
+
+    // MARK: - Initialization
+    init(type: DogType) {
+        self.dogType = type
+
+        let size: CGSize
+        let color: SKColor
+        let hasRedOutline: Bool
+
+        switch type {
+        case .smallGood:
+            size = Constants.smallDogSize
+            color = Constants.Colors.goodDogColor
+            hasRedOutline = false
+        case .bigGood:
+            size = Constants.bigDogSize
+            color = Constants.Colors.goodDogColor
+            hasRedOutline = false
+        case .bad:
+            size = Constants.badDogSize
+            color = Constants.Colors.goodDogColor
+            hasRedOutline = true
+        }
+
+        // Create dog body (simple oval shape)
+        let bodyPath = CGMutablePath()
+        bodyPath.addEllipse(in: CGRect(x: -size.width / 2, y: -size.height / 2,
+                                        width: size.width, height: size.height * 0.7))
+        bodyNode = SKShapeNode(path: bodyPath)
+        bodyNode.fillColor = color
+        bodyNode.strokeColor = hasRedOutline ? Constants.Colors.badDogColor : SKColor(white: 0.3, alpha: 1.0)
+        bodyNode.lineWidth = hasRedOutline ? 4 : 2
+
+        super.init()
+
+        addChild(bodyNode)
+
+        // Add head
+        let headSize = size.width * 0.5
+        let head = SKShapeNode(circleOfRadius: headSize / 2)
+        head.position = CGPoint(x: 0, y: size.height * 0.25)
+        head.fillColor = color
+        head.strokeColor = hasRedOutline ? Constants.Colors.badDogColor : SKColor(white: 0.3, alpha: 1.0)
+        head.lineWidth = hasRedOutline ? 3 : 1.5
+        addChild(head)
+
+        // Add ears
+        let earSize = headSize * 0.4
+        for xOffset in [-headSize * 0.4, headSize * 0.4] {
+            let ear = SKShapeNode(ellipseOf: CGSize(width: earSize, height: earSize * 1.5))
+            ear.position = CGPoint(x: xOffset, y: size.height * 0.25 + headSize * 0.35)
+            ear.fillColor = color.withAlphaComponent(0.8)
+            ear.strokeColor = hasRedOutline ? Constants.Colors.badDogColor : SKColor(white: 0.3, alpha: 1.0)
+            ear.lineWidth = hasRedOutline ? 2 : 1
+            addChild(ear)
+        }
+
+        // Add eyes
+        let eyeSize: CGFloat = headSize * 0.15
+        for xOffset in [-headSize * 0.15, headSize * 0.15] {
+            let eye = SKShapeNode(circleOfRadius: eyeSize)
+            eye.position = CGPoint(x: xOffset, y: size.height * 0.28)
+            eye.fillColor = hasRedOutline ? .red : .black
+            eye.strokeColor = .clear
+            addChild(eye)
+        }
+
+        // Add nose
+        let nose = SKShapeNode(circleOfRadius: headSize * 0.1)
+        nose.position = CGPoint(x: 0, y: size.height * 0.18)
+        nose.fillColor = .black
+        nose.strokeColor = .clear
+        addChild(nose)
+
+        // Add tail
+        let tailPath = CGMutablePath()
+        tailPath.move(to: CGPoint(x: 0, y: -size.height * 0.25))
+        tailPath.addQuadCurve(to: CGPoint(x: size.width * 0.3, y: -size.height * 0.1),
+                               control: CGPoint(x: size.width * 0.4, y: -size.height * 0.3))
+        let tail = SKShapeNode(path: tailPath)
+        tail.strokeColor = color
+        tail.lineWidth = size.width * 0.1
+        tail.lineCap = .round
+        addChild(tail)
+
+        // Add legs
+        let legWidth = size.width * 0.12
+        let legHeight = size.height * 0.25
+        let legPositions: [CGFloat] = [-size.width * 0.25, -size.width * 0.1,
+                                        size.width * 0.1, size.width * 0.25]
+        for xPos in legPositions {
+            let leg = SKShapeNode(rect: CGRect(x: xPos - legWidth / 2,
+                                                y: -size.height * 0.35 - legHeight,
+                                                width: legWidth, height: legHeight),
+                                  cornerRadius: legWidth / 2)
+            leg.fillColor = color
+            leg.strokeColor = hasRedOutline ? Constants.Colors.badDogColor : SKColor(white: 0.3, alpha: 1.0)
+            leg.lineWidth = hasRedOutline ? 2 : 1
+            addChild(leg)
+        }
+
+        // Add angry expression for bad dogs
+        if hasRedOutline {
+            let browPath = CGMutablePath()
+            browPath.move(to: CGPoint(x: -headSize * 0.3, y: size.height * 0.35))
+            browPath.addLine(to: CGPoint(x: -headSize * 0.05, y: size.height * 0.32))
+            let leftBrow = SKShapeNode(path: browPath)
+            leftBrow.strokeColor = .black
+            leftBrow.lineWidth = 2
+            addChild(leftBrow)
+
+            let browPath2 = CGMutablePath()
+            browPath2.move(to: CGPoint(x: headSize * 0.3, y: size.height * 0.35))
+            browPath2.addLine(to: CGPoint(x: headSize * 0.05, y: size.height * 0.32))
+            let rightBrow = SKShapeNode(path: browPath2)
+            rightBrow.strokeColor = .black
+            rightBrow.lineWidth = 2
+            addChild(rightBrow)
+        }
+
+        setupPhysics(size: size)
+        self.zPosition = Constants.ZPosition.entities
+        self.name = type.isHarmful ? "badDog" : "goodDog"
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    // MARK: - Physics Setup
+    private func setupPhysics(size: CGSize) {
+        let radius = min(size.width, size.height) / 2
+        physicsBody = SKPhysicsBody(circleOfRadius: radius)
+        physicsBody?.isDynamic = true
+        physicsBody?.affectedByGravity = false
+        physicsBody?.allowsRotation = false
+
+        if dogType.isHarmful {
+            physicsBody?.categoryBitMask = Constants.PhysicsCategory.badDog
+        } else {
+            physicsBody?.categoryBitMask = Constants.PhysicsCategory.goodDog
+        }
+
+        physicsBody?.contactTestBitMask = Constants.PhysicsCategory.suitcase
+        physicsBody?.collisionBitMask = Constants.PhysicsCategory.none
+    }
+}

RollkofferSimulator/Nodes/HumanNode.swift

@@ -0,0 +1,176 @@
+//
+//  HumanNode.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+/// A human entity node
+class HumanNode: SKNode {
+
+    // MARK: - Properties
+    let humanType: HumanType
+    private let bodyNode: SKShapeNode
+
+    // MARK: - Initialization
+    init(type: HumanType) {
+        self.humanType = type
+
+        let size = Constants.humanSize
+        let color: SKColor
+
+        switch type {
+        case .green:
+            color = Constants.Colors.greenHumanColor
+        case .gray:
+            color = Constants.Colors.grayHumanColor
+        }
+
+        // Create body (torso)
+        let torsoHeight = size.height * 0.4
+        let torsoWidth = size.width * 0.6
+        let torsoRect = CGRect(x: -torsoWidth / 2, y: -size.height * 0.1,
+                               width: torsoWidth, height: torsoHeight)
+        bodyNode = SKShapeNode(rect: torsoRect, cornerRadius: 5)
+        bodyNode.fillColor = color
+        bodyNode.strokeColor = color.withAlphaComponent(0.7)
+        bodyNode.lineWidth = 2
+
+        super.init()
+
+        addChild(bodyNode)
+
+        // Add head
+        let headRadius = size.width * 0.25
+        let head = SKShapeNode(circleOfRadius: headRadius)
+        head.position = CGPoint(x: 0, y: size.height * 0.35)
+        head.fillColor = SKColor(red: 1.0, green: 0.87, blue: 0.77, alpha: 1.0) // Skin tone
+        head.strokeColor = SKColor(red: 0.9, green: 0.75, blue: 0.65, alpha: 1.0)
+        head.lineWidth = 1
+        addChild(head)
+
+        // Add eyes
+        let eyeSize: CGFloat = 3
+        for xOffset in [-headRadius * 0.35, headRadius * 0.35] {
+            let eye = SKShapeNode(circleOfRadius: eyeSize)
+            eye.position = CGPoint(x: xOffset, y: size.height * 0.37)
+            eye.fillColor = .black
+            eye.strokeColor = .clear
+            addChild(eye)
+        }
+
+        // Add mouth/expression
+        if type == .green {
+            // Happy smile
+            let smilePath = CGMutablePath()
+            smilePath.addArc(center: CGPoint(x: 0, y: size.height * 0.32),
+                             radius: headRadius * 0.3,
+                             startAngle: .pi * 0.2,
+                             endAngle: .pi * 0.8,
+                             clockwise: true)
+            let smile = SKShapeNode(path: smilePath)
+            smile.strokeColor = .black
+            smile.lineWidth = 2
+            smile.lineCap = .round
+            addChild(smile)
+        } else {
+            // Neutral/frowning expression
+            let frownPath = CGMutablePath()
+            frownPath.move(to: CGPoint(x: -headRadius * 0.25, y: size.height * 0.3))
+            frownPath.addLine(to: CGPoint(x: headRadius * 0.25, y: size.height * 0.3))
+            let frown = SKShapeNode(path: frownPath)
+            frown.strokeColor = .black
+            frown.lineWidth = 2
+            addChild(frown)
+        }
+
+        // Add arms
+        let armWidth: CGFloat = 6
+        let armLength = size.height * 0.3
+        for xOffset in [-torsoWidth / 2 - armWidth / 2, torsoWidth / 2 + armWidth / 2] {
+            let arm = SKShapeNode(rect: CGRect(x: xOffset - armWidth / 2,
+                                                y: size.height * 0.05,
+                                                width: armWidth, height: armLength),
+                                  cornerRadius: armWidth / 2)
+            arm.fillColor = color
+            arm.strokeColor = color.withAlphaComponent(0.7)
+            arm.lineWidth = 1
+            addChild(arm)
+
+            // Add hand
+            let hand = SKShapeNode(circleOfRadius: armWidth * 0.8)
+            hand.position = CGPoint(x: xOffset, y: size.height * 0.05)
+            hand.fillColor = SKColor(red: 1.0, green: 0.87, blue: 0.77, alpha: 1.0)
+            hand.strokeColor = .clear
+            addChild(hand)
+        }
+
+        // Add legs
+        let legWidth: CGFloat = 10
+        let legHeight = size.height * 0.35
+        for xOffset in [-torsoWidth * 0.25, torsoWidth * 0.25] {
+            let leg = SKShapeNode(rect: CGRect(x: xOffset - legWidth / 2,
+                                                y: -size.height * 0.45,
+                                                width: legWidth, height: legHeight),
+                                  cornerRadius: legWidth / 2)
+            leg.fillColor = SKColor(red: 0.2, green: 0.2, blue: 0.4, alpha: 1.0) // Pants color
+            leg.strokeColor = SKColor(red: 0.15, green: 0.15, blue: 0.3, alpha: 1.0)
+            leg.lineWidth = 1
+            addChild(leg)
+
+            // Add shoe
+            let shoe = SKShapeNode(rect: CGRect(x: xOffset - legWidth * 0.6,
+                                                 y: -size.height * 0.48,
+                                                 width: legWidth * 1.2, height: 6),
+                                   cornerRadius: 2)
+            shoe.fillColor = .black
+            shoe.strokeColor = .clear
+            addChild(shoe)
+        }
+
+        // Add indicator icon for type
+        if type == .green {
+            let checkmark = SKLabelNode(text: "✓")
+            checkmark.fontSize = 16
+            checkmark.fontColor = .white
+            checkmark.position = CGPoint(x: 0, y: size.height * 0.1)
+            checkmark.verticalAlignmentMode = .center
+            addChild(checkmark)
+        } else {
+            let xMark = SKLabelNode(text: "✗")
+            xMark.fontSize = 16
+            xMark.fontColor = .white
+            xMark.position = CGPoint(x: 0, y: size.height * 0.1)
+            xMark.verticalAlignmentMode = .center
+            addChild(xMark)
+        }
+
+        setupPhysics(size: size)
+        self.zPosition = Constants.ZPosition.entities
+        self.name = type.isHarmful ? "grayHuman" : "greenHuman"
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    // MARK: - Physics Setup
+    private func setupPhysics(size: CGSize) {
+        physicsBody = SKPhysicsBody(rectangleOf: CGSize(width: size.width * 0.6,
+                                                         height: size.height * 0.8))
+        physicsBody?.isDynamic = true
+        physicsBody?.affectedByGravity = false
+        physicsBody?.allowsRotation = false
+
+        if humanType.isHarmful {
+            physicsBody?.categoryBitMask = Constants.PhysicsCategory.grayHuman
+        } else {
+            physicsBody?.categoryBitMask = Constants.PhysicsCategory.greenHuman
+        }
+
+        physicsBody?.contactTestBitMask = Constants.PhysicsCategory.suitcase
+        physicsBody?.collisionBitMask = Constants.PhysicsCategory.none
+    }
+}

RollkofferSimulator/Nodes/PlayerNode.swift

@@ -0,0 +1,126 @@
+//
+//  PlayerNode.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+/// The player-controlled suitcase node
+class PlayerNode: SKNode {
+
+    // MARK: - Properties
+    private let suitcaseBody: SKShapeNode
+    private let handle: SKShapeNode
+    private let wheels: [SKShapeNode]
+
+    // MARK: - Initialization
+    override init() {
+        let size = Constants.suitcaseSize
+
+        // Create suitcase body (rounded rectangle)
+        let bodyRect = CGRect(x: -size.width / 2, y: -size.height / 2 + 10,
+                              width: size.width, height: size.height - 15)
+        suitcaseBody = SKShapeNode(rect: bodyRect, cornerRadius: 8)
+        suitcaseBody.fillColor = Constants.Colors.suitcaseColor
+        suitcaseBody.strokeColor = SKColor(white: 0.2, alpha: 1.0)
+        suitcaseBody.lineWidth = 2
+
+        // Create handle
+        let handlePath = CGMutablePath()
+        handlePath.move(to: CGPoint(x: -10, y: size.height / 2 - 5))
+        handlePath.addLine(to: CGPoint(x: -10, y: size.height / 2 + 15))
+        handlePath.addLine(to: CGPoint(x: 10, y: size.height / 2 + 15))
+        handlePath.addLine(to: CGPoint(x: 10, y: size.height / 2 - 5))
+        handle = SKShapeNode(path: handlePath)
+        handle.strokeColor = SKColor(white: 0.3, alpha: 1.0)
+        handle.lineWidth = 4
+        handle.lineCap = .round
+
+        // Create wheels
+        var tempWheels: [SKShapeNode] = []
+        let wheelPositions = [
+            CGPoint(x: -size.width / 2 + 8, y: -size.height / 2 + 5),
+            CGPoint(x: size.width / 2 - 8, y: -size.height / 2 + 5)
+        ]
+        for pos in wheelPositions {
+            let wheel = SKShapeNode(circleOfRadius: 6)
+            wheel.position = pos
+            wheel.fillColor = SKColor.darkGray
+            wheel.strokeColor = SKColor.black
+            wheel.lineWidth = 1
+            tempWheels.append(wheel)
+        }
+        wheels = tempWheels
+
+        super.init()
+
+        // Add decorative stripes
+        let stripe1 = SKShapeNode(rect: CGRect(x: -size.width / 2 + 5, y: 0,
+                                                width: size.width - 10, height: 3))
+        stripe1.fillColor = SKColor(white: 0.3, alpha: 0.5)
+        stripe1.strokeColor = .clear
+
+        let stripe2 = SKShapeNode(rect: CGRect(x: -size.width / 2 + 5, y: -15,
+                                                width: size.width - 10, height: 3))
+        stripe2.fillColor = SKColor(white: 0.3, alpha: 0.5)
+        stripe2.strokeColor = .clear
+
+        addChild(suitcaseBody)
+        addChild(handle)
+        addChild(stripe1)
+        addChild(stripe2)
+        for wheel in wheels {
+            addChild(wheel)
+        }
+
+        setupPhysics()
+        self.zPosition = Constants.ZPosition.player
+        self.name = "player"
+    }
+
+    required init?(coder aDecoder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+
+    // MARK: - Physics Setup
+    private func setupPhysics() {
+        let size = Constants.suitcaseSize
+        physicsBody = SKPhysicsBody(rectangleOf: size)
+        physicsBody?.isDynamic = true
+        physicsBody?.affectedByGravity = false
+        physicsBody?.allowsRotation = false
+        physicsBody?.categoryBitMask = Constants.PhysicsCategory.suitcase
+        physicsBody?.contactTestBitMask = Constants.PhysicsCategory.all
+        physicsBody?.collisionBitMask = Constants.PhysicsCategory.none
+    }
+
+    // MARK: - Visual Effects
+    func startBlinking() {
+        let fadeOut = SKAction.fadeAlpha(to: 0.3, duration: Constants.blinkDuration)
+        let fadeIn = SKAction.fadeAlpha(to: 1.0, duration: Constants.blinkDuration)
+        let blink = SKAction.sequence([fadeOut, fadeIn])
+        let blinkRepeat = SKAction.repeat(blink, count: Constants.blinkCount)
+        run(blinkRepeat, withKey: "blink")
+    }
+
+    func stopBlinking() {
+        removeAction(forKey: "blink")
+        alpha = 1.0
+    }
+
+    // MARK: - Movement
+    func constrainToScreen(in frame: CGRect) {
+        let halfWidth = Constants.suitcaseSize.width / 2
+        let halfHeight = Constants.suitcaseSize.height / 2
+
+        let minX = frame.minX + halfWidth + 10
+        let maxX = frame.maxX - halfWidth - 10
+        let minY = frame.minY + halfHeight + 10
+        let maxY = frame.maxY - halfHeight - 100 // Leave space for UI
+
+        position.x = max(minX, min(maxX, position.x))
+        position.y = max(minY, min(maxY, position.y))
+    }
+}

RollkofferSimulator/RollkofferSimulator.xcodeproj/project.pbxproj

@@ -0,0 +1,457 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 56;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		001 /* AppDelegate.swift in Sources */ = {isa = PBXBuildFile; fileRef = 101 /* AppDelegate.swift */; };
+		002 /* GameViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 102 /* GameViewController.swift */; };
+		003 /* Constants.swift in Sources */ = {isa = PBXBuildFile; fileRef = 103 /* Constants.swift */; };
+		004 /* EntityType.swift in Sources */ = {isa = PBXBuildFile; fileRef = 104 /* EntityType.swift */; };
+		005 /* GameState.swift in Sources */ = {isa = PBXBuildFile; fileRef = 105 /* GameState.swift */; };
+		006 /* PlayerNode.swift in Sources */ = {isa = PBXBuildFile; fileRef = 106 /* PlayerNode.swift */; };
+		007 /* DogNode.swift in Sources */ = {isa = PBXBuildFile; fileRef = 107 /* DogNode.swift */; };
+		008 /* HumanNode.swift in Sources */ = {isa = PBXBuildFile; fileRef = 108 /* HumanNode.swift */; };
+		009 /* SpawnManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 109 /* SpawnManager.swift */; };
+		010 /* CollisionManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 110 /* CollisionManager.swift */; };
+		011 /* ScoreManager.swift in Sources */ = {isa = PBXBuildFile; fileRef = 111 /* ScoreManager.swift */; };
+		012 /* MenuScene.swift in Sources */ = {isa = PBXBuildFile; fileRef = 112 /* MenuScene.swift */; };
+		013 /* GameScene.swift in Sources */ = {isa = PBXBuildFile; fileRef = 113 /* GameScene.swift */; };
+		014 /* GameOverScene.swift in Sources */ = {isa = PBXBuildFile; fileRef = 114 /* GameOverScene.swift */; };
+		015 /* VictoryScene.swift in Sources */ = {isa = PBXBuildFile; fileRef = 115 /* VictoryScene.swift */; };
+		016 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 116 /* Assets.xcassets */; };
+		017 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 117 /* Main.storyboard */; };
+		018 /* LaunchScreen.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 118 /* LaunchScreen.storyboard */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXFileReference section */
+		100 /* RollkofferSimulator.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = RollkofferSimulator.app; sourceTree = BUILT_PRODUCTS_DIR; };
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+		102 /* GameViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GameViewController.swift; sourceTree = "<group>"; };
+		103 /* Constants.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Constants.swift; sourceTree = "<group>"; };
+		104 /* EntityType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EntityType.swift; sourceTree = "<group>"; };
+		105 /* GameState.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GameState.swift; sourceTree = "<group>"; };
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+		108 /* HumanNode.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HumanNode.swift; sourceTree = "<group>"; };
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+		110 /* CollisionManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = CollisionManager.swift; sourceTree = "<group>"; };
+		111 /* ScoreManager.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ScoreManager.swift; sourceTree = "<group>"; };
+		112 /* MenuScene.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MenuScene.swift; sourceTree = "<group>"; };
+		113 /* GameScene.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GameScene.swift; sourceTree = "<group>"; };
+		114 /* GameOverScene.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = GameOverScene.swift; sourceTree = "<group>"; };
+		115 /* VictoryScene.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VictoryScene.swift; sourceTree = "<group>"; };
+		116 /* Assets.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Assets.xcassets; sourceTree = "<group>"; };
+		117 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/Main.storyboard; sourceTree = "<group>"; };
+		118 /* Base */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; name = Base; path = Base.lproj/LaunchScreen.storyboard; sourceTree = "<group>"; };
+		119 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		200 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		300 = {
+			isa = PBXGroup;
+			children = (
+				301 /* RollkofferSimulator */,
+				302 /* Products */,
+			);
+			sourceTree = "<group>";
+		};
+		301 /* RollkofferSimulator */ = {
+			isa = PBXGroup;
+			children = (
+				101 /* AppDelegate.swift */,
+				102 /* GameViewController.swift */,
+				303 /* Scenes */,
+				304 /* Nodes */,
+				305 /* Managers */,
+				306 /* Models */,
+				307 /* Utils */,
+				116 /* Assets.xcassets */,
+				117 /* Main.storyboard */,
+				118 /* LaunchScreen.storyboard */,
+				119 /* Info.plist */,
+			);
+			path = .;
+			sourceTree = "<group>";
+		};
+		302 /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				100 /* RollkofferSimulator.app */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		303 /* Scenes */ = {
+			isa = PBXGroup;
+			children = (
+				112 /* MenuScene.swift */,
+				113 /* GameScene.swift */,
+				114 /* GameOverScene.swift */,
+				115 /* VictoryScene.swift */,
+			);
+			path = Scenes;
+			sourceTree = "<group>";
+		};
+		304 /* Nodes */ = {
+			isa = PBXGroup;
+			children = (
+				106 /* PlayerNode.swift */,
+				107 /* DogNode.swift */,
+				108 /* HumanNode.swift */,
+			);
+			path = Nodes;
+			sourceTree = "<group>";
+		};
+		305 /* Managers */ = {
+			isa = PBXGroup;
+			children = (
+				109 /* SpawnManager.swift */,
+				110 /* CollisionManager.swift */,
+				111 /* ScoreManager.swift */,
+			);
+			path = Managers;
+			sourceTree = "<group>";
+		};
+		306 /* Models */ = {
+			isa = PBXGroup;
+			children = (
+				104 /* EntityType.swift */,
+				105 /* GameState.swift */,
+			);
+			path = Models;
+			sourceTree = "<group>";
+		};
+		307 /* Utils */ = {
+			isa = PBXGroup;
+			children = (
+				103 /* Constants.swift */,
+			);
+			path = Utils;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		400 /* RollkofferSimulator */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 501 /* Build configuration list for PBXNativeTarget "RollkofferSimulator" */;
+			buildPhases = (
+				401 /* Sources */,
+				200 /* Frameworks */,
+				402 /* Resources */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = RollkofferSimulator;
+			productName = RollkofferSimulator;
+			productReference = 100 /* RollkofferSimulator.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		600 /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				BuildIndependentTargetsInParallel = 1;
+				LastSwiftUpdateCheck = 1500;
+				LastUpgradeCheck = 1500;
+				TargetAttributes = {
+					400 = {
+						CreatedOnToolsVersion = 15.0;
+					};
+				};
+			};
+			buildConfigurationList = 500 /* Build configuration list for PBXProject "RollkofferSimulator" */;
+			compatibilityVersion = "Xcode 14.0";
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+				Base,
+				de,
+			);
+			mainGroup = 300;
+			productRefGroup = 302 /* Products */;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				400 /* RollkofferSimulator */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		402 /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				016 /* Assets.xcassets in Resources */,
+				017 /* Main.storyboard in Resources */,
+				018 /* LaunchScreen.storyboard in Resources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		401 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				001 /* AppDelegate.swift in Sources */,
+				002 /* GameViewController.swift in Sources */,
+				003 /* Constants.swift in Sources */,
+				004 /* EntityType.swift in Sources */,
+				005 /* GameState.swift in Sources */,
+				006 /* PlayerNode.swift in Sources */,
+				007 /* DogNode.swift in Sources */,
+				008 /* HumanNode.swift in Sources */,
+				009 /* SpawnManager.swift in Sources */,
+				010 /* CollisionManager.swift in Sources */,
+				011 /* ScoreManager.swift in Sources */,
+				012 /* MenuScene.swift in Sources */,
+				013 /* GameScene.swift in Sources */,
+				014 /* GameOverScene.swift in Sources */,
+				015 /* VictoryScene.swift in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin PBXVariantGroup section */
+		117 /* Main.storyboard */ = {
+			isa = PBXVariantGroup;
+			children = (
+				117 /* Base */,
+			);
+			name = Main.storyboard;
+			sourceTree = "<group>";
+		};
+		118 /* LaunchScreen.storyboard */ = {
+			isa = PBXVariantGroup;
+			children = (
+				118 /* Base */,
+			);
+			name = LaunchScreen.storyboard;
+			sourceTree = "<group>";
+		};
+/* End PBXVariantGroup section */
+
+/* Begin XCBuildConfiguration section */
+		700 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
+				MTL_FAST_MATH = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				SDKROOT = iphoneos;
+				SWIFT_ACTIVE_COMPILATION_CONDITIONS = "DEBUG $(inherited)";
+				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+			};
+			name = Debug;
+		};
+		701 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				ASSETCATALOG_COMPILER_GENERATE_SWIFT_ASSET_SYMBOL_EXTENSIONS = YES;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
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+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_USER_SCRIPT_SANDBOXING = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu17;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
+				LOCALIZATION_PREFERS_STRING_CATALOGS = YES;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				MTL_FAST_MATH = YES;
+				SDKROOT = iphoneos;
+				SWIFT_COMPILATION_MODE = wholemodule;
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		702 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = Info.plist;
+				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
+				INFOPLIST_KEY_UILaunchStoryboardName = LaunchScreen;
+				INFOPLIST_KEY_UIMainStoryboardFile = Main;
+				INFOPLIST_KEY_UIStatusBarHidden = YES;
+				INFOPLIST_KEY_UISupportedInterfaceOrientations = UIInterfaceOrientationPortrait;
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.ingok.RollkofferSimulator;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Debug;
+		};
+		703 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = Info.plist;
+				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
+				INFOPLIST_KEY_UILaunchStoryboardName = LaunchScreen;
+				INFOPLIST_KEY_UIMainStoryboardFile = Main;
+				INFOPLIST_KEY_UIStatusBarHidden = YES;
+				INFOPLIST_KEY_UISupportedInterfaceOrientations = UIInterfaceOrientationPortrait;
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown";
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = com.ingok.RollkofferSimulator;
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				SWIFT_VERSION = 5.0;
+				TARGETED_DEVICE_FAMILY = "1,2";
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		500 /* Build configuration list for PBXProject "RollkofferSimulator" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				700 /* Debug */,
+				701 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		501 /* Build configuration list for PBXNativeTarget "RollkofferSimulator" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				702 /* Debug */,
+				703 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 600 /* Project object */;
+}

RollkofferSimulator/Scenes/GameOverScene.swift

@@ -0,0 +1,255 @@
+//
+//  GameOverScene.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+class GameOverScene: SKScene {
+
+    // MARK: - Properties
+    var finalScore: Int = 0
+    var dogsCollected: Int = 0
+    var humansCollected: Int = 0
+    var isNewHighScore: Bool = false
+
+    private var retryButton: SKShapeNode!
+    private var menuButton: SKShapeNode!
+
+    // MARK: - Scene Lifecycle
+    override func didMove(to view: SKView) {
+        setupBackground()
+        setupContent()
+        setupButtons()
+        startAnimations()
+    }
+
+    // MARK: - Setup
+    private func setupBackground() {
+        backgroundColor = SKColor(red: 0.15, green: 0.1, blue: 0.1, alpha: 1.0)
+
+        // Add dim pattern
+        for i in 0..<20 {
+            let x = CGFloat.random(in: 0...frame.width)
+            let y = CGFloat.random(in: 0...frame.height)
+            let size = CGFloat.random(in: 20...60)
+
+            let shape = SKShapeNode(circleOfRadius: size)
+            shape.position = CGPoint(x: x, y: y)
+            shape.fillColor = SKColor.red.withAlphaComponent(0.05)
+            shape.strokeColor = .clear
+            shape.zPosition = 0.1
+            addChild(shape)
+        }
+    }
+
+    private func setupContent() {
+        // Game Over title
+        let titleLabel = SKLabelNode(text: "💔 GAME OVER 💔")
+        titleLabel.fontName = "AvenirNext-Heavy"
+        titleLabel.fontSize = 42
+        titleLabel.fontColor = .red
+        titleLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.8)
+        titleLabel.zPosition = Constants.ZPosition.ui
+        addChild(titleLabel)
+
+        // Subtitle based on reason
+        let subtitleText: String
+        if dogsCollected < Constants.targetDogs || humansCollected < Constants.targetHumans {
+            subtitleText = "Zeit abgelaufen!"
+        } else {
+            subtitleText = "Keine Leben mehr!"
+        }
+
+        let subtitleLabel = SKLabelNode(text: subtitleText)
+        subtitleLabel.fontName = "AvenirNext-Medium"
+        subtitleLabel.fontSize = 22
+        subtitleLabel.fontColor = SKColor(white: 0.8, alpha: 1.0)
+        subtitleLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.72)
+        subtitleLabel.zPosition = Constants.ZPosition.ui
+        addChild(subtitleLabel)
+
+        // Score display
+        let scoreLabel = SKLabelNode(text: "Punkte: \(finalScore)")
+        scoreLabel.fontName = "AvenirNext-Bold"
+        scoreLabel.fontSize = 32
+        scoreLabel.fontColor = .white
+        scoreLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.58)
+        scoreLabel.zPosition = Constants.ZPosition.ui
+        addChild(scoreLabel)
+
+        // New high score indicator
+        if isNewHighScore {
+            let highScoreLabel = SKLabelNode(text: "🏆 NEUER HIGHSCORE! 🏆")
+            highScoreLabel.fontName = "AvenirNext-Heavy"
+            highScoreLabel.fontSize = 24
+            highScoreLabel.fontColor = SKColor.yellow
+            highScoreLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.65)
+            highScoreLabel.zPosition = Constants.ZPosition.ui
+            addChild(highScoreLabel)
+
+            // Animate high score
+            let scale = SKAction.sequence([
+                SKAction.scale(to: 1.1, duration: 0.5),
+                SKAction.scale(to: 1.0, duration: 0.5)
+            ])
+            highScoreLabel.run(SKAction.repeatForever(scale))
+        }
+
+        // Stats display
+        let dogsText = "🐕 \(dogsCollected)/\(Constants.targetDogs)"
+        let humansText = "👤 \(humansCollected)/\(Constants.targetHumans)"
+
+        let statsLabel = SKLabelNode(text: "\(dogsText)  |  \(humansText)")
+        statsLabel.fontName = "AvenirNext-Medium"
+        statsLabel.fontSize = 24
+        statsLabel.fontColor = SKColor(white: 0.7, alpha: 1.0)
+        statsLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.48)
+        statsLabel.zPosition = Constants.ZPosition.ui
+        addChild(statsLabel)
+
+        // Progress indicators
+        let dogsProgress = min(1.0, CGFloat(dogsCollected) / CGFloat(Constants.targetDogs))
+        let humansProgress = min(1.0, CGFloat(humansCollected) / CGFloat(Constants.targetHumans))
+
+        addProgressBar(at: CGPoint(x: frame.midX - 60, y: frame.height * 0.42),
+                       progress: dogsProgress, color: .orange, label: "Hunde")
+        addProgressBar(at: CGPoint(x: frame.midX + 60, y: frame.height * 0.42),
+                       progress: humansProgress, color: .green, label: "Menschen")
+
+        // Sad suitcase
+        let sadSuitcase = PlayerNode()
+        sadSuitcase.position = CGPoint(x: frame.midX, y: frame.height * 0.25)
+        sadSuitcase.alpha = 0.6
+        sadSuitcase.setScale(0.8)
+        addChild(sadSuitcase)
+
+        // Sad face on suitcase area
+        let sadFace = SKLabelNode(text: "😢")
+        sadFace.fontSize = 30
+        sadFace.position = CGPoint(x: frame.midX, y: frame.height * 0.25 + 20)
+        sadFace.zPosition = Constants.ZPosition.ui
+        addChild(sadFace)
+    }
+
+    private func addProgressBar(at position: CGPoint, progress: CGFloat, color: SKColor, label: String) {
+        let barWidth: CGFloat = 80
+        let barHeight: CGFloat = 12
+
+        // Background
+        let bg = SKShapeNode(rect: CGRect(x: -barWidth / 2, y: 0, width: barWidth, height: barHeight),
+                             cornerRadius: 6)
+        bg.position = position
+        bg.fillColor = SKColor(white: 0.3, alpha: 1.0)
+        bg.strokeColor = .clear
+        bg.zPosition = Constants.ZPosition.ui
+        addChild(bg)
+
+        // Progress fill
+        let fillWidth = barWidth * progress
+        if fillWidth > 0 {
+            let fill = SKShapeNode(rect: CGRect(x: -barWidth / 2, y: 0, width: fillWidth, height: barHeight),
+                                   cornerRadius: 6)
+            fill.position = position
+            fill.fillColor = progress >= 1.0 ? .green : color
+            fill.strokeColor = .clear
+            fill.zPosition = Constants.ZPosition.ui + 0.1
+            addChild(fill)
+        }
+    }
+
+    private func setupButtons() {
+        // Retry button
+        retryButton = createButton(text: "🔄 Nochmal", color: SKColor(red: 0.2, green: 0.6, blue: 0.2, alpha: 1.0))
+        retryButton.position = CGPoint(x: frame.midX, y: frame.height * 0.15)
+        retryButton.name = "retryButton"
+        addChild(retryButton)
+
+        // Menu button
+        menuButton = createButton(text: "🏠 Menü", color: SKColor(red: 0.3, green: 0.3, blue: 0.5, alpha: 1.0))
+        menuButton.position = CGPoint(x: frame.midX, y: frame.height * 0.08)
+        menuButton.name = "menuButton"
+        addChild(menuButton)
+    }
+
+    private func createButton(text: String, color: SKColor) -> SKShapeNode {
+        let buttonWidth: CGFloat = 180
+        let buttonHeight: CGFloat = 50
+
+        let button = SKShapeNode(rect: CGRect(x: -buttonWidth / 2, y: -buttonHeight / 2,
+                                               width: buttonWidth, height: buttonHeight),
+                                 cornerRadius: 12)
+        button.fillColor = color
+        button.strokeColor = color.withAlphaComponent(0.5)
+        button.lineWidth = 2
+        button.zPosition = Constants.ZPosition.ui
+
+        let label = SKLabelNode(text: text)
+        label.fontName = "AvenirNext-Bold"
+        label.fontSize = 22
+        label.fontColor = .white
+        label.verticalAlignmentMode = .center
+        label.zPosition = 1
+        button.addChild(label)
+
+        return button
+    }
+
+    private func startAnimations() {
+        // Fade in effect
+        alpha = 0
+        let fadeIn = SKAction.fadeIn(withDuration: 0.5)
+        run(fadeIn)
+
+        // Button pulse
+        let pulse = SKAction.sequence([
+            SKAction.scale(to: 1.05, duration: 0.8),
+            SKAction.scale(to: 1.0, duration: 0.8)
+        ])
+        retryButton.run(SKAction.repeatForever(pulse))
+    }
+
+    // MARK: - Touch Handling
+    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
+        guard let touch = touches.first else { return }
+        let location = touch.location(in: self)
+
+        if retryButton.contains(location) {
+            retryGame()
+        } else if menuButton.contains(location) {
+            returnToMenu()
+        }
+    }
+
+    private func retryGame() {
+        let pressDown = SKAction.scale(to: 0.9, duration: 0.1)
+        let pressUp = SKAction.scale(to: 1.0, duration: 0.1)
+
+        retryButton.run(SKAction.sequence([pressDown, pressUp])) { [weak self] in
+            guard let self = self else { return }
+
+            let gameScene = GameScene(size: self.size)
+            gameScene.scaleMode = self.scaleMode
+
+            let transition = SKTransition.fade(withDuration: 0.5)
+            self.view?.presentScene(gameScene, transition: transition)
+        }
+    }
+
+    private func returnToMenu() {
+        let pressDown = SKAction.scale(to: 0.9, duration: 0.1)
+        let pressUp = SKAction.scale(to: 1.0, duration: 0.1)
+
+        menuButton.run(SKAction.sequence([pressDown, pressUp])) { [weak self] in
+            guard let self = self else { return }
+
+            let menuScene = MenuScene(size: self.size)
+            menuScene.scaleMode = self.scaleMode
+
+            let transition = SKTransition.fade(withDuration: 0.5)
+            self.view?.presentScene(menuScene, transition: transition)
+        }
+    }
+}

RollkofferSimulator/Scenes/GameScene.swift

@@ -0,0 +1,537 @@
+//
+//  GameScene.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+class GameScene: SKScene {
+
+    // MARK: - Game Objects
+    private var player: PlayerNode!
+    private var gameState: GameState!
+
+    // MARK: - Managers
+    private var spawnManager: SpawnManager!
+    private var collisionManager: CollisionManager!
+
+    // MARK: - UI Elements
+    private var livesLabel: SKLabelNode!
+    private var scoreLabel: SKLabelNode!
+    private var dogsLabel: SKLabelNode!
+    private var humansLabel: SKLabelNode!
+    private var timerLabel: SKLabelNode!
+    private var pauseButton: SKShapeNode!
+    private var pauseOverlay: SKNode?
+
+    // MARK: - Touch Handling
+    private var touchOffset: CGPoint = .zero
+    private var isDragging: Bool = false
+
+    // MARK: - Timing
+    private var lastUpdateTime: TimeInterval = 0
+
+    // MARK: - Background Scrolling
+    private var floorTiles: [SKShapeNode] = []
+    private let tileSize: CGFloat = 80
+
+    // MARK: - Scene Lifecycle
+    override func didMove(to view: SKView) {
+        setupGame()
+    }
+
+    // MARK: - Setup
+    private func setupGame() {
+        // Initialize game state
+        gameState = GameState()
+        gameState.reset()
+
+        // Setup physics
+        physicsWorld.gravity = .zero
+        collisionManager = CollisionManager()
+        collisionManager.delegate = self
+        collisionManager.setScene(self)
+        physicsWorld.contactDelegate = collisionManager
+
+        setupBackground()
+        setupPlayer()
+        setupUI()
+        setupSpawnManager()
+
+        spawnManager.startSpawning()
+    }
+
+    private func setupBackground() {
+        backgroundColor = Constants.Colors.backgroundColor
+
+        // Create scrolling floor tiles
+        let rows = Int(frame.height / tileSize) + 3
+        let cols = Int(frame.width / tileSize) + 1
+
+        for row in 0..<rows {
+            for col in 0..<cols {
+                let tile = SKShapeNode(rect: CGRect(x: 0, y: 0,
+                                                     width: tileSize - 2, height: tileSize - 2))
+                let isEven = (row + col) % 2 == 0
+                tile.fillColor = isEven ?
+                    SKColor(white: 0.78, alpha: 1.0) : SKColor(white: 0.72, alpha: 1.0)
+                tile.strokeColor = SKColor(white: 0.65, alpha: 0.5)
+                tile.lineWidth = 1
+                tile.position = CGPoint(x: CGFloat(col) * tileSize,
+                                         y: CGFloat(row) * tileSize)
+                tile.zPosition = Constants.ZPosition.floor
+                tile.name = "floorTile"
+                addChild(tile)
+                floorTiles.append(tile)
+            }
+        }
+
+        // Add airport markings
+        addAirportMarkings()
+    }
+
+    private func addAirportMarkings() {
+        // Center line
+        let lineWidth: CGFloat = 4
+        let dashLength: CGFloat = 30
+        let gapLength: CGFloat = 20
+
+        for y in stride(from: CGFloat(0), to: frame.height, by: dashLength + gapLength) {
+            let dash = SKShapeNode(rect: CGRect(x: frame.midX - lineWidth / 2, y: y,
+                                                 width: lineWidth, height: dashLength))
+            dash.fillColor = SKColor.yellow.withAlphaComponent(0.6)
+            dash.strokeColor = .clear
+            dash.zPosition = Constants.ZPosition.floor + 0.5
+            dash.name = "floorMarking"
+            addChild(dash)
+        }
+    }
+
+    private func setupPlayer() {
+        player = PlayerNode()
+        player.position = CGPoint(x: frame.midX, y: frame.height * 0.15)
+        addChild(player)
+    }
+
+    private func setupUI() {
+        let uiY = frame.height - 50
+        let uiY2 = frame.height - 80
+
+        // Lives
+        livesLabel = createUILabel(text: gameState.formattedLives, fontSize: 24)
+        livesLabel.position = CGPoint(x: 60, y: uiY)
+        livesLabel.horizontalAlignmentMode = .left
+        addChild(livesLabel)
+
+        // Score
+        scoreLabel = createUILabel(text: gameState.formattedScore, fontSize: 20)
+        scoreLabel.position = CGPoint(x: frame.midX, y: uiY)
+        addChild(scoreLabel)
+
+        // Dogs counter
+        dogsLabel = createUILabel(text: gameState.formattedDogs, fontSize: 18)
+        dogsLabel.position = CGPoint(x: frame.width - 120, y: uiY)
+        addChild(dogsLabel)
+
+        // Humans counter
+        humansLabel = createUILabel(text: gameState.formattedHumans, fontSize: 18)
+        humansLabel.position = CGPoint(x: frame.width - 50, y: uiY)
+        addChild(humansLabel)
+
+        // Timer
+        timerLabel = createUILabel(text: "⏱️ \(gameState.formattedTime)", fontSize: 22)
+        timerLabel.position = CGPoint(x: frame.midX, y: uiY2)
+        addChild(timerLabel)
+
+        // Pause button
+        setupPauseButton()
+
+        // UI background bar
+        let uiBar = SKShapeNode(rect: CGRect(x: 0, y: frame.height - 100,
+                                              width: frame.width, height: 100))
+        uiBar.fillColor = SKColor.white.withAlphaComponent(0.9)
+        uiBar.strokeColor = SKColor.gray.withAlphaComponent(0.5)
+        uiBar.lineWidth = 1
+        uiBar.zPosition = Constants.ZPosition.ui - 1
+        addChild(uiBar)
+    }
+
+    private func createUILabel(text: String, fontSize: CGFloat) -> SKLabelNode {
+        let label = SKLabelNode(text: text)
+        label.fontName = "AvenirNext-Bold"
+        label.fontSize = fontSize
+        label.fontColor = .darkGray
+        label.zPosition = Constants.ZPosition.ui
+        label.verticalAlignmentMode = .center
+        return label
+    }
+
+    private func setupPauseButton() {
+        let buttonSize: CGFloat = 36
+        pauseButton = SKShapeNode(rect: CGRect(x: -buttonSize / 2, y: -buttonSize / 2,
+                                                width: buttonSize, height: buttonSize),
+                                  cornerRadius: 8)
+        pauseButton.fillColor = SKColor(white: 0.9, alpha: 1.0)
+        pauseButton.strokeColor = SKColor.gray
+        pauseButton.lineWidth = 2
+        pauseButton.position = CGPoint(x: 40, y: frame.height - 75)
+        pauseButton.zPosition = Constants.ZPosition.ui
+        pauseButton.name = "pauseButton"
+        addChild(pauseButton)
+
+        // Pause icon (two vertical bars)
+        let barWidth: CGFloat = 4
+        let barHeight: CGFloat = 16
+        let barGap: CGFloat = 5
+
+        let leftBar = SKShapeNode(rect: CGRect(x: -barGap - barWidth / 2, y: -barHeight / 2,
+                                                width: barWidth, height: barHeight))
+        leftBar.fillColor = .darkGray
+        leftBar.strokeColor = .clear
+        pauseButton.addChild(leftBar)
+
+        let rightBar = SKShapeNode(rect: CGRect(x: barGap - barWidth / 2, y: -barHeight / 2,
+                                                 width: barWidth, height: barHeight))
+        rightBar.fillColor = .darkGray
+        rightBar.strokeColor = .clear
+        pauseButton.addChild(rightBar)
+    }
+
+    private func setupSpawnManager() {
+        spawnManager = SpawnManager(scene: self)
+    }
+
+    // MARK: - Update Loop
+    override func update(_ currentTime: TimeInterval) {
+        guard gameState.currentState == .playing else { return }
+
+        // Calculate delta time
+        let deltaTime = lastUpdateTime > 0 ? currentTime - lastUpdateTime : 0
+        lastUpdateTime = currentTime
+
+        // Update game time
+        gameState.updateTime(delta: deltaTime)
+        updateUI()
+
+        // Update spawn manager
+        spawnManager.update(deltaTime: deltaTime)
+
+        // Update floor scrolling
+        updateFloorScrolling(deltaTime: deltaTime)
+
+        // Check game end conditions
+        checkGameEndConditions()
+    }
+
+    private func updateFloorScrolling(deltaTime: TimeInterval) {
+        let scrollAmount = Constants.scrollSpeed * CGFloat(deltaTime)
+
+        for tile in floorTiles {
+            tile.position.y -= scrollAmount
+
+            // Reset tile position when it scrolls off screen
+            if tile.position.y < -tileSize {
+                tile.position.y += CGFloat(floorTiles.count / (Int(frame.width / tileSize) + 1)) * tileSize
+            }
+        }
+
+        // Also scroll floor markings
+        enumerateChildNodes(withName: "floorMarking") { node, _ in
+            node.position.y -= scrollAmount
+            if node.position.y < -30 {
+                node.position.y += self.frame.height + 50
+            }
+        }
+    }
+
+    private func updateUI() {
+        livesLabel.text = gameState.formattedLives
+        scoreLabel.text = gameState.formattedScore
+        dogsLabel.text = gameState.formattedDogs
+        humansLabel.text = gameState.formattedHumans
+        timerLabel.text = "⏱️ \(gameState.formattedTime)"
+
+        // Flash timer when low
+        if gameState.timeRemaining <= 10 {
+            timerLabel.fontColor = .red
+
+            if timerLabel.action(forKey: "flash") == nil {
+                let flash = SKAction.sequence([
+                    SKAction.scale(to: 1.2, duration: 0.25),
+                    SKAction.scale(to: 1.0, duration: 0.25)
+                ])
+                timerLabel.run(SKAction.repeatForever(flash), withKey: "flash")
+            }
+        }
+    }
+
+    private func checkGameEndConditions() {
+        if gameState.hasWon {
+            handleVictory()
+        } else if gameState.hasLost {
+            handleGameOver()
+        }
+    }
+
+    // MARK: - Touch Handling
+    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
+        guard let touch = touches.first else { return }
+        let location = touch.location(in: self)
+
+        // Check pause button
+        if pauseButton.contains(location) {
+            togglePause()
+            return
+        }
+
+        // Check if touching player for dragging
+        if player.contains(location) {
+            isDragging = true
+            touchOffset = CGPoint(x: player.position.x - location.x,
+                                  y: player.position.y - location.y)
+        } else {
+            // Move player to touch location
+            isDragging = true
+            touchOffset = .zero
+            player.position = location
+            player.constrainToScreen(in: frame)
+        }
+    }
+
+    override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
+        guard isDragging, gameState.currentState == .playing,
+              let touch = touches.first else { return }
+
+        let location = touch.location(in: self)
+        player.position = CGPoint(x: location.x + touchOffset.x,
+                                  y: location.y + touchOffset.y)
+        player.constrainToScreen(in: frame)
+    }
+
+    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
+        isDragging = false
+    }
+
+    override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
+        isDragging = false
+    }
+
+    // MARK: - Pause Handling
+    private func togglePause() {
+        if gameState.currentState == .playing {
+            pauseGame()
+        } else if gameState.currentState == .paused {
+            resumeGame()
+        }
+    }
+
+    private func pauseGame() {
+        gameState.setState(.paused)
+        spawnManager.stopSpawning()
+        isPaused = true
+
+        showPauseOverlay()
+    }
+
+    private func resumeGame() {
+        hidePauseOverlay()
+
+        gameState.setState(.playing)
+        spawnManager.startSpawning()
+        isPaused = false
+        lastUpdateTime = 0
+    }
+
+    private func showPauseOverlay() {
+        pauseOverlay = SKNode()
+        pauseOverlay?.zPosition = Constants.ZPosition.ui + 10
+
+        // Dimmed background
+        let dim = SKShapeNode(rect: frame)
+        dim.fillColor = SKColor.black.withAlphaComponent(0.6)
+        dim.strokeColor = .clear
+        pauseOverlay?.addChild(dim)
+
+        // Pause text
+        let pauseText = SKLabelNode(text: "⏸️ PAUSIERT")
+        pauseText.fontName = "AvenirNext-Heavy"
+        pauseText.fontSize = 40
+        pauseText.fontColor = .white
+        pauseText.position = CGPoint(x: frame.midX, y: frame.midY + 40)
+        pauseOverlay?.addChild(pauseText)
+
+        // Resume button
+        let resumeButton = createButton(text: "▶️ Weiter", at: CGPoint(x: frame.midX, y: frame.midY - 20))
+        resumeButton.name = "resumeButton"
+        pauseOverlay?.addChild(resumeButton)
+
+        // Menu button
+        let menuButton = createButton(text: "🏠 Menü", at: CGPoint(x: frame.midX, y: frame.midY - 80))
+        menuButton.name = "menuButton"
+        pauseOverlay?.addChild(menuButton)
+
+        addChild(pauseOverlay!)
+    }
+
+    private func createButton(text: String, at position: CGPoint) -> SKNode {
+        let container = SKNode()
+        container.position = position
+
+        let bg = SKShapeNode(rect: CGRect(x: -80, y: -25, width: 160, height: 50),
+                             cornerRadius: 10)
+        bg.fillColor = SKColor(white: 0.2, alpha: 0.9)
+        bg.strokeColor = .white
+        bg.lineWidth = 2
+        container.addChild(bg)
+
+        let label = SKLabelNode(text: text)
+        label.fontName = "AvenirNext-Bold"
+        label.fontSize = 22
+        label.fontColor = .white
+        label.verticalAlignmentMode = .center
+        container.addChild(label)
+
+        return container
+    }
+
+    private func hidePauseOverlay() {
+        pauseOverlay?.removeFromParent()
+        pauseOverlay = nil
+    }
+
+    // MARK: - Handle pause overlay touches (override to handle when paused)
+    func handlePauseOverlayTouch(at location: CGPoint) {
+        guard let overlay = pauseOverlay else { return }
+
+        if let resumeButton = overlay.childNode(withName: "resumeButton"),
+           resumeButton.contains(location) {
+            resumeGame()
+        } else if let menuButton = overlay.childNode(withName: "menuButton"),
+                  menuButton.contains(location) {
+            returnToMenu()
+        }
+    }
+
+    // Override touchesBegan to handle pause overlay
+    func handleTouchInPausedState(_ touches: Set<UITouch>) {
+        guard let touch = touches.first else { return }
+        let location = touch.location(in: self)
+        handlePauseOverlayTouch(at: location)
+    }
+
+    // MARK: - Game End Handling
+    private func handleDamage() {
+        guard !gameState.isInvincible else { return }
+
+        if gameState.loseLife() {
+            // Start invincibility
+            gameState.isInvincible = true
+            player.startBlinking()
+
+            // End invincibility after duration
+            let wait = SKAction.wait(forDuration: Constants.invincibilityDuration)
+            run(wait) { [weak self] in
+                self?.gameState.isInvincible = false
+                self?.player.stopBlinking()
+            }
+        }
+    }
+
+    private func handleVictory() {
+        gameState.setState(.victory)
+        spawnManager.stopSpawning()
+
+        // Record score
+        ScoreManager.shared.recordGameEnd(
+            score: gameState.score,
+            dogsCollected: gameState.dogsCollected,
+            humansCollected: gameState.humansCollected,
+            didWin: true
+        )
+
+        // Transition to victory scene
+        let victoryScene = VictoryScene(size: size)
+        victoryScene.scaleMode = scaleMode
+        victoryScene.finalScore = gameState.score
+        victoryScene.dogsCollected = gameState.dogsCollected
+        victoryScene.humansCollected = gameState.humansCollected
+        victoryScene.timeRemaining = gameState.timeRemaining
+
+        let transition = SKTransition.fade(withDuration: 0.5)
+        view?.presentScene(victoryScene, transition: transition)
+    }
+
+    private func handleGameOver() {
+        gameState.setState(.gameOver)
+        spawnManager.stopSpawning()
+
+        // Record score
+        ScoreManager.shared.recordGameEnd(
+            score: gameState.score,
+            dogsCollected: gameState.dogsCollected,
+            humansCollected: gameState.humansCollected,
+            didWin: false
+        )
+
+        // Transition to game over scene
+        let gameOverScene = GameOverScene(size: size)
+        gameOverScene.scaleMode = scaleMode
+        gameOverScene.finalScore = gameState.score
+        gameOverScene.dogsCollected = gameState.dogsCollected
+        gameOverScene.humansCollected = gameState.humansCollected
+        gameOverScene.isNewHighScore = ScoreManager.shared.isNewHighScore(gameState.score)
+
+        let transition = SKTransition.fade(withDuration: 0.5)
+        view?.presentScene(gameOverScene, transition: transition)
+    }
+
+    private func returnToMenu() {
+        let menuScene = MenuScene(size: size)
+        menuScene.scaleMode = scaleMode
+
+        let transition = SKTransition.fade(withDuration: 0.5)
+        view?.presentScene(menuScene, transition: transition)
+    }
+}
+
+// MARK: - CollisionManagerDelegate
+extension GameScene: CollisionManagerDelegate {
+    func didCollectGoodDog(points: Int) {
+        gameState.addPoints(points)
+        gameState.collectDog()
+
+        // Show collection effect
+        showPointsEffect(points: points, at: player.position)
+    }
+
+    func didCollectGreenHuman(points: Int) {
+        gameState.addPoints(points)
+        gameState.collectHuman()
+
+        // Show collection effect
+        showPointsEffect(points: points, at: player.position)
+    }
+
+    func didHitHarmfulEntity() {
+        handleDamage()
+    }
+
+    private func showPointsEffect(points: Int, at position: CGPoint) {
+        let label = SKLabelNode(text: "+\(points)")
+        label.fontName = "AvenirNext-Bold"
+        label.fontSize = 24
+        label.fontColor = .green
+        label.position = CGPoint(x: position.x, y: position.y + 50)
+        label.zPosition = Constants.ZPosition.ui
+
+        addChild(label)
+
+        let moveUp = SKAction.moveBy(x: 0, y: 40, duration: 0.5)
+        let fadeOut = SKAction.fadeOut(withDuration: 0.5)
+        let group = SKAction.group([moveUp, fadeOut])
+        let remove = SKAction.removeFromParent()
+        label.run(SKAction.sequence([group, remove]))
+    }
+}

RollkofferSimulator/Scenes/MenuScene.swift

@@ -0,0 +1,265 @@
+//
+//  MenuScene.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+class MenuScene: SKScene {
+
+    // MARK: - Properties
+    private var startButton: SKShapeNode!
+    private var titleLabel: SKLabelNode!
+    private var subtitleLabel: SKLabelNode!
+    private var highScoreLabel: SKLabelNode!
+    private var creditsLabel: SKLabelNode!
+
+    // MARK: - Decorative elements
+    private var decorativeSuitcase: PlayerNode!
+    private var decorativeDogs: [DogNode] = []
+    private var decorativeHumans: [HumanNode] = []
+
+    // MARK: - Scene Lifecycle
+    override func didMove(to view: SKView) {
+        setupBackground()
+        setupTitle()
+        setupStartButton()
+        setupHighScore()
+        setupDecorations()
+        setupCredits()
+        startAnimations()
+    }
+
+    // MARK: - Setup
+    private func setupBackground() {
+        backgroundColor = Constants.Colors.backgroundColor
+
+        // Create floor pattern
+        let floorHeight = frame.height * 0.6
+        let floor = SKShapeNode(rect: CGRect(x: 0, y: 0,
+                                              width: frame.width, height: floorHeight))
+        floor.fillColor = Constants.Colors.floorColor
+        floor.strokeColor = .clear
+        floor.zPosition = Constants.ZPosition.floor
+        addChild(floor)
+
+        // Add floor tiles pattern
+        let tileSize: CGFloat = 80
+        for x in stride(from: CGFloat(0), to: frame.width, by: tileSize) {
+            for y in stride(from: CGFloat(0), to: floorHeight, by: tileSize) {
+                let tile = SKShapeNode(rect: CGRect(x: x, y: y,
+                                                     width: tileSize - 2, height: tileSize - 2))
+                tile.fillColor = (Int((x + y) / tileSize) % 2 == 0) ?
+                    SKColor(white: 0.78, alpha: 1.0) : SKColor(white: 0.72, alpha: 1.0)
+                tile.strokeColor = SKColor(white: 0.65, alpha: 0.5)
+                tile.lineWidth = 1
+                tile.zPosition = Constants.ZPosition.floor + 0.1
+                addChild(tile)
+            }
+        }
+    }
+
+    private func setupTitle() {
+        // Main title
+        titleLabel = SKLabelNode(text: "🧳 Rollkoffer Simulator 🧳")
+        titleLabel.fontName = "AvenirNext-Heavy"
+        titleLabel.fontSize = 36
+        titleLabel.fontColor = SKColor(red: 0.3, green: 0.2, blue: 0.5, alpha: 1.0)
+        titleLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.85)
+        titleLabel.zPosition = Constants.ZPosition.ui
+        addChild(titleLabel)
+
+        // Subtitle
+        subtitleLabel = SKLabelNode(text: "Sammle Hunde & Menschen am Flughafen!")
+        subtitleLabel.fontName = "AvenirNext-Medium"
+        subtitleLabel.fontSize = 18
+        subtitleLabel.fontColor = SKColor.darkGray
+        subtitleLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.78)
+        subtitleLabel.zPosition = Constants.ZPosition.ui
+        addChild(subtitleLabel)
+
+        // Goal info
+        let goalLabel = SKLabelNode(text: "Ziel: 🐕 10 Hunde + 👤 5 Grüne Menschen")
+        goalLabel.fontName = "AvenirNext-Medium"
+        goalLabel.fontSize = 16
+        goalLabel.fontColor = SKColor.gray
+        goalLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.72)
+        goalLabel.zPosition = Constants.ZPosition.ui
+        addChild(goalLabel)
+    }
+
+    private func setupStartButton() {
+        // Button background
+        let buttonWidth: CGFloat = 200
+        let buttonHeight: CGFloat = 60
+
+        startButton = SKShapeNode(rect: CGRect(x: -buttonWidth / 2, y: -buttonHeight / 2,
+                                                width: buttonWidth, height: buttonHeight),
+                                  cornerRadius: 15)
+        startButton.fillColor = SKColor(red: 0.2, green: 0.7, blue: 0.3, alpha: 1.0)
+        startButton.strokeColor = SKColor(red: 0.15, green: 0.5, blue: 0.2, alpha: 1.0)
+        startButton.lineWidth = 3
+        startButton.position = CGPoint(x: frame.midX, y: frame.height * 0.5)
+        startButton.zPosition = Constants.ZPosition.ui
+        startButton.name = "startButton"
+        addChild(startButton)
+
+        // Button label
+        let buttonLabel = SKLabelNode(text: "▶ START")
+        buttonLabel.fontName = "AvenirNext-Bold"
+        buttonLabel.fontSize = 28
+        buttonLabel.fontColor = .white
+        buttonLabel.verticalAlignmentMode = .center
+        buttonLabel.position = .zero
+        buttonLabel.zPosition = 1
+        startButton.addChild(buttonLabel)
+
+        // Button pulse animation
+        let scaleUp = SKAction.scale(to: 1.05, duration: 0.8)
+        let scaleDown = SKAction.scale(to: 1.0, duration: 0.8)
+        let pulse = SKAction.sequence([scaleUp, scaleDown])
+        startButton.run(SKAction.repeatForever(pulse))
+    }
+
+    private func setupHighScore() {
+        let highScore = ScoreManager.shared.highScore
+
+        highScoreLabel = SKLabelNode(text: "🏆 High Score: \(highScore)")
+        highScoreLabel.fontName = "AvenirNext-DemiBold"
+        highScoreLabel.fontSize = 20
+        highScoreLabel.fontColor = SKColor(red: 0.8, green: 0.6, blue: 0.1, alpha: 1.0)
+        highScoreLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.38)
+        highScoreLabel.zPosition = Constants.ZPosition.ui
+        addChild(highScoreLabel)
+
+        // Statistics label
+        let victories = ScoreManager.shared.victories
+        let gamesPlayed = ScoreManager.shared.gamesPlayed
+        let statsText = "Siege: \(victories) | Spiele: \(gamesPlayed)"
+
+        let statsLabel = SKLabelNode(text: statsText)
+        statsLabel.fontName = "AvenirNext-Regular"
+        statsLabel.fontSize = 14
+        statsLabel.fontColor = SKColor.gray
+        statsLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.33)
+        statsLabel.zPosition = Constants.ZPosition.ui
+        addChild(statsLabel)
+    }
+
+    private func setupDecorations() {
+        // Decorative suitcase
+        decorativeSuitcase = PlayerNode()
+        decorativeSuitcase.position = CGPoint(x: frame.midX, y: frame.height * 0.2)
+        decorativeSuitcase.zPosition = Constants.ZPosition.entities
+        addChild(decorativeSuitcase)
+
+        // Add some decorative dogs
+        let dogTypes: [DogType] = [.smallGood, .bigGood, .bad]
+        let dogPositions: [CGPoint] = [
+            CGPoint(x: frame.width * 0.15, y: frame.height * 0.25),
+            CGPoint(x: frame.width * 0.85, y: frame.height * 0.22),
+            CGPoint(x: frame.width * 0.25, y: frame.height * 0.12)
+        ]
+
+        for (index, type) in dogTypes.enumerated() {
+            let dog = DogNode(type: type)
+            dog.position = dogPositions[index]
+            dog.zPosition = Constants.ZPosition.entities
+            addChild(dog)
+            decorativeDogs.append(dog)
+        }
+
+        // Add decorative humans
+        let humanTypes: [HumanType] = [.green, .gray]
+        let humanPositions: [CGPoint] = [
+            CGPoint(x: frame.width * 0.75, y: frame.height * 0.15),
+            CGPoint(x: frame.width * 0.6, y: frame.height * 0.1)
+        ]
+
+        for (index, type) in humanTypes.enumerated() {
+            let human = HumanNode(type: type)
+            human.position = humanPositions[index]
+            human.zPosition = Constants.ZPosition.entities
+            addChild(human)
+            decorativeHumans.append(human)
+        }
+    }
+
+    private func setupCredits() {
+        creditsLabel = SKLabelNode(text: "Created by Ingo K.")
+        creditsLabel.fontName = "AvenirNext-Italic"
+        creditsLabel.fontSize = 14
+        creditsLabel.fontColor = SKColor.gray
+        creditsLabel.position = CGPoint(x: frame.midX, y: 30)
+        creditsLabel.zPosition = Constants.ZPosition.ui
+        addChild(creditsLabel)
+    }
+
+    private func startAnimations() {
+        // Animate decorative suitcase
+        let moveLeft = SKAction.moveBy(x: -20, y: 0, duration: 1.5)
+        let moveRight = SKAction.moveBy(x: 40, y: 0, duration: 3.0)
+        let moveBack = SKAction.moveBy(x: -20, y: 0, duration: 1.5)
+        let suitcaseSequence = SKAction.sequence([moveLeft, moveRight, moveBack])
+        decorativeSuitcase.run(SKAction.repeatForever(suitcaseSequence))
+
+        // Animate decorative entities
+        for (index, dog) in decorativeDogs.enumerated() {
+            let delay = Double(index) * 0.3
+            let bounce = SKAction.sequence([
+                SKAction.wait(forDuration: delay),
+                SKAction.moveBy(x: 0, y: 10, duration: 0.4),
+                SKAction.moveBy(x: 0, y: -10, duration: 0.4)
+            ])
+            dog.run(SKAction.repeatForever(bounce))
+        }
+
+        for (index, human) in decorativeHumans.enumerated() {
+            let delay = Double(index) * 0.4 + 0.2
+            let sway = SKAction.sequence([
+                SKAction.wait(forDuration: delay),
+                SKAction.rotate(byAngle: 0.05, duration: 0.5),
+                SKAction.rotate(byAngle: -0.1, duration: 1.0),
+                SKAction.rotate(byAngle: 0.05, duration: 0.5)
+            ])
+            human.run(SKAction.repeatForever(sway))
+        }
+
+        // Title animation
+        let titleScale = SKAction.sequence([
+            SKAction.scale(to: 1.02, duration: 2.0),
+            SKAction.scale(to: 1.0, duration: 2.0)
+        ])
+        titleLabel.run(SKAction.repeatForever(titleScale))
+    }
+
+    // MARK: - Touch Handling
+    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
+        guard let touch = touches.first else { return }
+        let location = touch.location(in: self)
+
+        if startButton.contains(location) {
+            startGame()
+        }
+    }
+
+    private func startGame() {
+        // Button press effect
+        let pressDown = SKAction.scale(to: 0.9, duration: 0.1)
+        let pressUp = SKAction.scale(to: 1.0, duration: 0.1)
+
+        startButton.run(SKAction.sequence([pressDown, pressUp])) { [weak self] in
+            self?.transitionToGame()
+        }
+    }
+
+    private func transitionToGame() {
+        let gameScene = GameScene(size: size)
+        gameScene.scaleMode = scaleMode
+
+        let transition = SKTransition.fade(withDuration: 0.5)
+        view?.presentScene(gameScene, transition: transition)
+    }
+}

RollkofferSimulator/Scenes/VictoryScene.swift

@@ -0,0 +1,312 @@
+//
+//  VictoryScene.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+class VictoryScene: SKScene {
+
+    // MARK: - Properties
+    var finalScore: Int = 0
+    var dogsCollected: Int = 0
+    var humansCollected: Int = 0
+    var timeRemaining: TimeInterval = 0
+
+    private var playAgainButton: SKShapeNode!
+    private var menuButton: SKShapeNode!
+
+    // MARK: - Scene Lifecycle
+    override func didMove(to view: SKView) {
+        setupBackground()
+        setupContent()
+        setupButtons()
+        startCelebration()
+    }
+
+    // MARK: - Setup
+    private func setupBackground() {
+        backgroundColor = SKColor(red: 0.1, green: 0.2, blue: 0.1, alpha: 1.0)
+
+        // Add celebration particles
+        for _ in 0..<30 {
+            let confetti = createConfetti()
+            addChild(confetti)
+        }
+    }
+
+    private func createConfetti() -> SKShapeNode {
+        let size = CGFloat.random(in: 8...15)
+        let confetti = SKShapeNode(rectOf: CGSize(width: size, height: size * 1.5))
+        confetti.fillColor = [SKColor.red, SKColor.yellow, SKColor.green,
+                              SKColor.blue, SKColor.orange, SKColor.purple].randomElement()!
+        confetti.strokeColor = .clear
+        confetti.position = CGPoint(x: CGFloat.random(in: 0...frame.width),
+                                     y: frame.height + CGFloat.random(in: 50...200))
+        confetti.zPosition = Constants.ZPosition.ui - 5
+        confetti.zRotation = CGFloat.random(in: 0...(.pi * 2))
+
+        // Falling animation
+        let fallDuration = Double.random(in: 3...6)
+        let fall = SKAction.moveTo(y: -50, duration: fallDuration)
+        let rotate = SKAction.rotate(byAngle: .pi * 4, duration: fallDuration)
+        let sway = SKAction.sequence([
+            SKAction.moveBy(x: 30, y: 0, duration: 0.5),
+            SKAction.moveBy(x: -30, y: 0, duration: 0.5)
+        ])
+        let swayRepeat = SKAction.repeat(sway, count: Int(fallDuration))
+
+        let group = SKAction.group([fall, rotate, swayRepeat])
+        let reset = SKAction.run { [weak confetti, weak self] in
+            confetti?.position = CGPoint(x: CGFloat.random(in: 0...(self?.frame.width ?? 400)),
+                                          y: (self?.frame.height ?? 800) + 50)
+        }
+        let sequence = SKAction.sequence([group, reset])
+        confetti.run(SKAction.repeatForever(sequence))
+
+        return confetti
+    }
+
+    private func setupContent() {
+        // Victory title
+        let titleLabel = SKLabelNode(text: "🎉 GEWONNEN! 🎉")
+        titleLabel.fontName = "AvenirNext-Heavy"
+        titleLabel.fontSize = 46
+        titleLabel.fontColor = .yellow
+        titleLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.82)
+        titleLabel.zPosition = Constants.ZPosition.ui
+        addChild(titleLabel)
+
+        // Animate title
+        let titlePulse = SKAction.sequence([
+            SKAction.scale(to: 1.1, duration: 0.3),
+            SKAction.scale(to: 1.0, duration: 0.3)
+        ])
+        titleLabel.run(SKAction.repeatForever(titlePulse))
+
+        // Subtitle
+        let subtitleLabel = SKLabelNode(text: "Du hast alle Ziele erreicht!")
+        subtitleLabel.fontName = "AvenirNext-Medium"
+        subtitleLabel.fontSize = 20
+        subtitleLabel.fontColor = .white
+        subtitleLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.74)
+        subtitleLabel.zPosition = Constants.ZPosition.ui
+        addChild(subtitleLabel)
+
+        // Score display
+        let scoreLabel = SKLabelNode(text: "Endpunktzahl: \(finalScore)")
+        scoreLabel.fontName = "AvenirNext-Bold"
+        scoreLabel.fontSize = 36
+        scoreLabel.fontColor = SKColor(red: 1.0, green: 0.85, blue: 0.0, alpha: 1.0)
+        scoreLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.62)
+        scoreLabel.zPosition = Constants.ZPosition.ui
+        addChild(scoreLabel)
+
+        // Time bonus display
+        let timeBonus = Int(timeRemaining) * 5
+        if timeBonus > 0 {
+            let timeBonusLabel = SKLabelNode(text: "⏱️ Zeitbonus: +\(timeBonus) (\(Int(timeRemaining))s übrig)")
+            timeBonusLabel.fontName = "AvenirNext-Medium"
+            timeBonusLabel.fontSize = 18
+            timeBonusLabel.fontColor = SKColor.cyan
+            timeBonusLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.55)
+            timeBonusLabel.zPosition = Constants.ZPosition.ui
+            addChild(timeBonusLabel)
+        }
+
+        // Stats display
+        let statsY = frame.height * 0.45
+
+        let dogsLabel = SKLabelNode(text: "🐕 Hunde: \(dogsCollected)")
+        dogsLabel.fontName = "AvenirNext-DemiBold"
+        dogsLabel.fontSize = 22
+        dogsLabel.fontColor = .white
+        dogsLabel.position = CGPoint(x: frame.midX - 80, y: statsY)
+        dogsLabel.zPosition = Constants.ZPosition.ui
+        addChild(dogsLabel)
+
+        let humansLabel = SKLabelNode(text: "👤 Menschen: \(humansCollected)")
+        humansLabel.fontName = "AvenirNext-DemiBold"
+        humansLabel.fontSize = 22
+        humansLabel.fontColor = .white
+        humansLabel.position = CGPoint(x: frame.midX + 80, y: statsY)
+        humansLabel.zPosition = Constants.ZPosition.ui
+        addChild(humansLabel)
+
+        // Happy suitcase with collected items
+        let happySuitcase = PlayerNode()
+        happySuitcase.position = CGPoint(x: frame.midX, y: frame.height * 0.28)
+        addChild(happySuitcase)
+
+        // Happy face
+        let happyFace = SKLabelNode(text: "😄")
+        happyFace.fontSize = 30
+        happyFace.position = CGPoint(x: frame.midX, y: frame.height * 0.28 + 20)
+        happyFace.zPosition = Constants.ZPosition.ui
+        addChild(happyFace)
+
+        // Add small dogs and humans around suitcase
+        let collectibles = [
+            ("🐕", CGPoint(x: -50, y: 0)),
+            ("🐕", CGPoint(x: 50, y: 0)),
+            ("👤", CGPoint(x: -35, y: 30)),
+            ("👤", CGPoint(x: 35, y: 30))
+        ]
+
+        for (emoji, offset) in collectibles {
+            let label = SKLabelNode(text: emoji)
+            label.fontSize = 24
+            label.position = CGPoint(x: frame.midX + offset.x,
+                                      y: frame.height * 0.28 + offset.y)
+            label.zPosition = Constants.ZPosition.ui
+            addChild(label)
+
+            // Bounce animation
+            let bounce = SKAction.sequence([
+                SKAction.moveBy(x: 0, y: 5, duration: 0.3),
+                SKAction.moveBy(x: 0, y: -5, duration: 0.3)
+            ])
+            label.run(SKAction.repeatForever(bounce))
+        }
+
+        // High score check
+        if ScoreManager.shared.isNewHighScore(finalScore) {
+            let highScoreLabel = SKLabelNode(text: "🏆 NEUER HIGHSCORE! 🏆")
+            highScoreLabel.fontName = "AvenirNext-Heavy"
+            highScoreLabel.fontSize = 26
+            highScoreLabel.fontColor = SKColor.yellow
+            highScoreLabel.position = CGPoint(x: frame.midX, y: frame.height * 0.68)
+            highScoreLabel.zPosition = Constants.ZPosition.ui
+            addChild(highScoreLabel)
+
+            let glow = SKAction.sequence([
+                SKAction.fadeAlpha(to: 0.6, duration: 0.4),
+                SKAction.fadeAlpha(to: 1.0, duration: 0.4)
+            ])
+            highScoreLabel.run(SKAction.repeatForever(glow))
+        }
+    }
+
+    private func setupButtons() {
+        // Play Again button
+        playAgainButton = createButton(text: "🎮 Nochmal spielen",
+                                        color: SKColor(red: 0.2, green: 0.7, blue: 0.3, alpha: 1.0))
+        playAgainButton.position = CGPoint(x: frame.midX, y: frame.height * 0.13)
+        playAgainButton.name = "playAgainButton"
+        addChild(playAgainButton)
+
+        // Menu button
+        menuButton = createButton(text: "🏠 Hauptmenü",
+                                   color: SKColor(red: 0.3, green: 0.3, blue: 0.6, alpha: 1.0))
+        menuButton.position = CGPoint(x: frame.midX, y: frame.height * 0.06)
+        menuButton.name = "menuButton"
+        addChild(menuButton)
+    }
+
+    private func createButton(text: String, color: SKColor) -> SKShapeNode {
+        let buttonWidth: CGFloat = 220
+        let buttonHeight: CGFloat = 50
+
+        let button = SKShapeNode(rect: CGRect(x: -buttonWidth / 2, y: -buttonHeight / 2,
+                                               width: buttonWidth, height: buttonHeight),
+                                 cornerRadius: 12)
+        button.fillColor = color
+        button.strokeColor = .white.withAlphaComponent(0.5)
+        button.lineWidth = 2
+        button.zPosition = Constants.ZPosition.ui
+
+        let label = SKLabelNode(text: text)
+        label.fontName = "AvenirNext-Bold"
+        label.fontSize = 20
+        label.fontColor = .white
+        label.verticalAlignmentMode = .center
+        label.zPosition = 1
+        button.addChild(label)
+
+        return button
+    }
+
+    private func startCelebration() {
+        // Screen flash
+        let flash = SKShapeNode(rect: frame)
+        flash.fillColor = .white
+        flash.strokeColor = .clear
+        flash.zPosition = Constants.ZPosition.ui + 100
+        flash.alpha = 0.8
+        addChild(flash)
+
+        let fadeOut = SKAction.fadeOut(withDuration: 0.5)
+        let remove = SKAction.removeFromParent()
+        flash.run(SKAction.sequence([fadeOut, remove]))
+
+        // Star burst effect
+        for _ in 0..<12 {
+            let star = SKLabelNode(text: "⭐")
+            star.fontSize = CGFloat.random(in: 20...40)
+            star.position = CGPoint(x: frame.midX, y: frame.height * 0.82)
+            star.zPosition = Constants.ZPosition.ui - 1
+            star.alpha = 0
+            addChild(star)
+
+            let angle = CGFloat.random(in: 0...(.pi * 2))
+            let distance = CGFloat.random(in: 100...200)
+            let endPoint = CGPoint(x: frame.midX + cos(angle) * distance,
+                                    y: frame.height * 0.82 + sin(angle) * distance)
+
+            let fadeIn = SKAction.fadeIn(withDuration: 0.2)
+            let move = SKAction.move(to: endPoint, duration: 0.5)
+            let fadeOutStar = SKAction.fadeOut(withDuration: 0.3)
+            let removeStar = SKAction.removeFromParent()
+
+            let group = SKAction.group([move, SKAction.sequence([fadeIn,
+                                                                  SKAction.wait(forDuration: 0.2),
+                                                                  fadeOutStar])])
+            star.run(SKAction.sequence([SKAction.wait(forDuration: Double.random(in: 0...0.3)),
+                                         group, removeStar]))
+        }
+    }
+
+    // MARK: - Touch Handling
+    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
+        guard let touch = touches.first else { return }
+        let location = touch.location(in: self)
+
+        if playAgainButton.contains(location) {
+            playAgain()
+        } else if menuButton.contains(location) {
+            returnToMenu()
+        }
+    }
+
+    private func playAgain() {
+        let pressDown = SKAction.scale(to: 0.9, duration: 0.1)
+        let pressUp = SKAction.scale(to: 1.0, duration: 0.1)
+
+        playAgainButton.run(SKAction.sequence([pressDown, pressUp])) { [weak self] in
+            guard let self = self else { return }
+
+            let gameScene = GameScene(size: self.size)
+            gameScene.scaleMode = self.scaleMode
+
+            let transition = SKTransition.fade(withDuration: 0.5)
+            self.view?.presentScene(gameScene, transition: transition)
+        }
+    }
+
+    private func returnToMenu() {
+        let pressDown = SKAction.scale(to: 0.9, duration: 0.1)
+        let pressUp = SKAction.scale(to: 1.0, duration: 0.1)
+
+        menuButton.run(SKAction.sequence([pressDown, pressUp])) { [weak self] in
+            guard let self = self else { return }
+
+            let menuScene = MenuScene(size: self.size)
+            menuScene.scaleMode = self.scaleMode
+
+            let transition = SKTransition.fade(withDuration: 0.5)
+            self.view?.presentScene(menuScene, transition: transition)
+        }
+    }
+}

RollkofferSimulator/Utils/Constants.swift

@@ -0,0 +1,79 @@
+//
+//  Constants.swift
+//  RollkofferSimulator
+//
+//  Created by Ingo K.
+//
+
+import SpriteKit
+
+struct Constants {
+
+    // MARK: - Game Settings
+    static let gameTime: TimeInterval = 90.0
+    static let startLives: Int = 3
+    static let targetDogs: Int = 10
+    static let targetHumans: Int = 5
+
+    // MARK: - Points
+    static let pointsSmallGoodDog: Int = 10
+    static let pointsBigGoodDog: Int = 25
+    static let pointsGreenHuman: Int = 15
+
+    // MARK: - Spawn Settings
+    static let spawnIntervalMin: TimeInterval = 0.8
+    static let spawnIntervalMax: TimeInterval = 1.5
+    static let scrollSpeed: CGFloat = 200.0
+
+    // MARK: - Spawn Distribution (cumulative percentages)
+    static let spawnChanceGoodDog: Int = 40      // 0-39: good dogs
+    static let spawnChanceBadDog: Int = 60       // 40-59: bad dogs (20%)
+    static let spawnChanceGreenHuman: Int = 85   // 60-84: green humans (25%)
+    // 85-99: gray humans (15%)
+
+    // MARK: - Sprite Sizes
+    static let suitcaseSize = CGSize(width: 60, height: 80)
+    static let smallDogSize = CGSize(width: 40, height: 40)
+    static let bigDogSize = CGSize(width: 70, height: 70)
+    static let badDogSize = CGSize(width: 55, height: 55)
+    static let humanSize = CGSize(width: 50, height: 80)
+
+    // MARK: - Physics Categories (Bitmasks)
+    struct PhysicsCategory {
+        static let none: UInt32       = 0
+        static let suitcase: UInt32   = 0x1 << 0
+        static let goodDog: UInt32    = 0x1 << 1
+        static let badDog: UInt32     = 0x1 << 2
+        static let greenHuman: UInt32 = 0x1 << 3
+        static let grayHuman: UInt32  = 0x1 << 4
+
+        static let collectible: UInt32 = goodDog | greenHuman
+        static let harmful: UInt32 = badDog | grayHuman
+        static let all: UInt32 = goodDog | badDog | greenHuman | grayHuman
+    }
+
+    // MARK: - Colors
+    struct Colors {
+        static let goodDogColor = SKColor(red: 0.85, green: 0.65, blue: 0.13, alpha: 1.0) // Gold brown
+        static let badDogColor = SKColor.red
+        static let greenHumanColor = SKColor(red: 0.2, green: 0.8, blue: 0.2, alpha: 1.0)
+        static let grayHumanColor = SKColor.gray
+        static let suitcaseColor = SKColor(red: 0.4, green: 0.3, blue: 0.6, alpha: 1.0)
+        static let backgroundColor = SKColor(red: 0.9, green: 0.9, blue: 0.85, alpha: 1.0)
+        static let floorColor = SKColor(red: 0.75, green: 0.75, blue: 0.7, alpha: 1.0)
+    }
+
+    // MARK: - Z-Positions
+    struct ZPosition {
+        static let background: CGFloat = 0
+        static let floor: CGFloat = 1
+        static let entities: CGFloat = 10
+        static let player: CGFloat = 20
+        static let ui: CGFloat = 100
+    }
+
+    // MARK: - Animation
+    static let blinkDuration: TimeInterval = 0.1
+    static let blinkCount: Int = 6
+    static let invincibilityDuration: TimeInterval = 1.5
+}