===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,322 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+var storage = LK.import("@upit/storage.v1");
+
+/**** 
+* Classes
+****/ 
+var MenuButton = Container.expand(function (text, callback) {
+	var self = Container.call(this);
+	var buttonGraphics = self.attachAsset('menuButton', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var buttonText = new Text2(text, {
+		size: 40,
+		fill: 0xFFFFFF
+	});
+	buttonText.anchor.set(0.5, 0.5);
+	self.addChild(buttonText);
+	self.down = function () {
+		if (callback) callback();
+	};
+	return self;
+});
+var SkinButton = Container.expand(function (skinType, callback) {
+	var self = Container.call(this);
+	var buttonGraphics = self.attachAsset('skinButton', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var skinPreview = self.attachAsset(skinType, {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 0.6,
+		scaleY: 0.6
+	});
+	self.down = function () {
+		if (callback) callback();
+	};
+	return self;
+});
+var Spike = Container.expand(function () {
+	var self = Container.call(this);
+	self.speed = -8;
+	self.passed = false;
+	var spikeGraphics = self.attachAsset('spike', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.update = function () {
+		self.x += self.speed;
+	};
+	return self;
+});
+var Turtle = Container.expand(function () {
+	var self = Container.call(this);
+	self.skinType = 'turtle_default';
+	self.isJumping = false;
+	self.jumpSpeed = 0;
+	self.groundY = 0;
+	self.gravity = 0.8;
+	self.jumpPower = -18;
+	self.graphics = null;
+	self.setSkin = function (skinType) {
+		if (self.graphics) {
+			self.removeChild(self.graphics);
+		}
+		self.skinType = skinType;
+		self.graphics = self.attachAsset(skinType, {
+			anchorX: 0.5,
+			anchorY: 1.0
+		});
+	};
+	self.jump = function () {
+		if (!self.isJumping) {
+			self.isJumping = true;
+			self.jumpSpeed = self.jumpPower;
+			LK.getSound('jump').play();
+		}
+	};
+	self.update = function () {
+		if (self.isJumping) {
+			self.jumpSpeed += self.gravity;
+			self.y += self.jumpSpeed;
+			if (self.y >= self.groundY) {
+				self.y = self.groundY;
+				self.isJumping = false;
+				self.jumpSpeed = 0;
+			}
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87ceeb
+});
+
+/**** 
+* Game Code
+****/ 
+// Game states
+var gameState = 'menu'; // 'menu', 'playing', 'gameOver'
+var currentSkin = storage.selectedSkin || 'turtle_default';
+// Game elements
+var turtle = null;
+var spikes = [];
+var ground = null;
+var scoreText = null;
+var gameScore = 0;
+var lastSpikeTime = 0;
+var spikeInterval = 2000; // milliseconds
+var minSpikeInterval = 800;
+// Menu elements
+var menuContainer = null;
+var skinMenuContainer = null;
+// Initialize ground
+ground = game.addChild(LK.getAsset('ground', {
+	anchorX: 0,
+	anchorY: 1.0,
+	x: 0,
+	y: 2732 - 100
+}));
+// Initialize score display
+scoreText = new Text2('0', {
+	size: 100,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreText);
+scoreText.y = 50;
+function createMainMenu() {
+	menuContainer = game.addChild(new Container());
+	// Title
+	var titleText = new Text2('Turtle Run', {
+		size: 120,
+		fill: 0xFFFFFF
+	});
+	titleText.anchor.set(0.5, 0.5);
+	titleText.x = 2048 / 2;
+	titleText.y = 800;
+	menuContainer.addChild(titleText);
+	// Play button
+	var playButton = menuContainer.addChild(new MenuButton('PLAY', function () {
+		startGame();
+	}));
+	playButton.x = 2048 / 2;
+	playButton.y = 1200;
+	// Skins button
+	var skinsButton = menuContainer.addChild(new MenuButton('SKINS', function () {
+		showSkinMenu();
+	}));
+	skinsButton.x = 2048 / 2;
+	skinsButton.y = 1320;
+	// High score display
+	var highScore = storage.highScore || 0;
+	var highScoreText = new Text2('High Score: ' + highScore, {
+		size: 60,
+		fill: 0xFFFFFF
+	});
+	highScoreText.anchor.set(0.5, 0.5);
+	highScoreText.x = 2048 / 2;
+	highScoreText.y = 1500;
+	menuContainer.addChild(highScoreText);
+}
+function showSkinMenu() {
+	if (menuContainer) {
+		menuContainer.visible = false;
+	}
+	skinMenuContainer = game.addChild(new Container());
+	// Title
+	var titleText = new Text2('Choose Skin', {
+		size: 80,
+		fill: 0xFFFFFF
+	});
+	titleText.anchor.set(0.5, 0.5);
+	titleText.x = 2048 / 2;
+	titleText.y = 600;
+	skinMenuContainer.addChild(titleText);
+	// Skin options
+	var skins = ['turtle_default', 'turtle_blue', 'turtle_red', 'turtle_purple'];
+	var startX = 2048 / 2 - 200;
+	var startY = 900;
+	for (var i = 0; i < skins.length; i++) {
+		var skinButton = skinMenuContainer.addChild(new SkinButton(skins[i], function (skin) {
+			return function () {
+				currentSkin = skin;
+				storage.selectedSkin = skin;
+				hideSkinMenu();
+			};
+		}(skins[i])));
+		skinButton.x = startX + i % 2 * 400;
+		skinButton.y = startY + Math.floor(i / 2) * 150;
+		// Highlight selected skin
+		if (skins[i] === currentSkin) {
+			skinButton.graphics.tint = 0x90ee90;
+		}
+	}
+	// Back button
+	var backButton = skinMenuContainer.addChild(new MenuButton('BACK', function () {
+		hideSkinMenu();
+	}));
+	backButton.x = 2048 / 2;
+	backButton.y = 1400;
+}
+function hideSkinMenu() {
+	if (skinMenuContainer) {
+		skinMenuContainer.destroy();
+		skinMenuContainer = null;
+	}
+	if (menuContainer) {
+		menuContainer.visible = true;
+	}
+}
+function startGame() {
+	gameState = 'playing';
+	gameScore = 0;
+	lastSpikeTime = 0;
+	spikeInterval = 2000;
+	// Hide menu
+	if (menuContainer) {
+		menuContainer.visible = false;
+	}
+	// Create turtle
+	turtle = game.addChild(new Turtle());
+	turtle.setSkin(currentSkin);
+	turtle.x = 300;
+	turtle.y = ground.y;
+	turtle.groundY = ground.y;
+	// Clear existing spikes
+	for (var i = spikes.length - 1; i >= 0; i--) {
+		spikes[i].destroy();
+	}
+	spikes = [];
+	// Update score display
+	scoreText.setText(gameScore);
+}
+function gameOver() {
+	gameState = 'gameOver';
+	// Update high score
+	if (gameScore > (storage.highScore || 0)) {
+		storage.highScore = gameScore;
+	}
+	// Play hit sound
+	LK.getSound('hit').play();
+	// Flash screen red
+	LK.effects.flashScreen(0xff0000, 500);
+	// Show game over after delay
+	LK.setTimeout(function () {
+		LK.showGameOver();
+	}, 500);
+}
+function resetGame() {
+	gameState = 'menu';
+	// Clean up turtle
+	if (turtle) {
+		turtle.destroy();
+		turtle = null;
+	}
+	// Clean up spikes
+	for (var i = spikes.length - 1; i >= 0; i--) {
+		spikes[i].destroy();
+	}
+	spikes = [];
+	// Show menu
+	if (menuContainer) {
+		menuContainer.visible = true;
+	} else {
+		createMainMenu();
+	}
+}
+// Touch input for jumping
+game.down = function (x, y, obj) {
+	if (gameState === 'playing' && turtle) {
+		turtle.jump();
+	}
+};
+// Main game loop
+game.update = function () {
+	if (gameState === 'playing') {
+		// Spawn spikes
+		if (LK.ticks - lastSpikeTime > spikeInterval) {
+			var spike = game.addChild(new Spike());
+			spike.x = 2048 + 100;
+			spike.y = ground.y;
+			spikes.push(spike);
+			lastSpikeTime = LK.ticks;
+			// Increase difficulty
+			if (spikeInterval > minSpikeInterval) {
+				spikeInterval -= 20;
+			}
+		}
+		// Update spikes and check collisions
+		for (var i = spikes.length - 1; i >= 0; i--) {
+			var spike = spikes[i];
+			// Remove off-screen spikes
+			if (spike.x < -100) {
+				spike.destroy();
+				spikes.splice(i, 1);
+				continue;
+			}
+			// Check if spike was passed for scoring
+			if (!spike.passed && spike.x < turtle.x) {
+				spike.passed = true;
+				gameScore++;
+				scoreText.setText(gameScore);
+			}
+			// Check collision with turtle
+			if (turtle && turtle.intersects(spike)) {
+				gameOver();
+				return;
+			}
+		}
+	}
+};
+// Initialize main menu
+createMainMenu();
\ No newline at end of file