===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,377 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Coin = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('coin', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.collected = false;
+	self.update = function () {
+		if (!self.collected) {
+			self.rotation += 0.1;
+			if (self.intersects(player)) {
+				self.collect();
+			}
+		}
+	};
+	self.collect = function () {
+		if (!self.collected) {
+			self.collected = true;
+			LK.setScore(LK.getScore() + 10);
+			scoreTxt.setText(LK.getScore());
+			LK.getSound('coin').play();
+			tween(self, {
+				scaleX: 0,
+				scaleY: 0,
+				alpha: 0
+			}, {
+				duration: 300,
+				onFinish: function onFinish() {
+					self.destroy();
+				}
+			});
+		}
+	};
+	return self;
+});
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.velocityX = -2;
+	self.defeated = false;
+	self.update = function () {
+		if (!self.defeated) {
+			self.x += self.velocityX;
+			// Bounce off platforms
+			if (self.x <= 100 || self.x >= 1948) {
+				self.velocityX *= -1;
+			}
+			if (self.intersects(player)) {
+				if (player.velocityY > 0 && player.y < self.y - 20) {
+					// Player jumped on enemy
+					self.defeat();
+					player.velocityY = -10; // Bounce player up
+				} else {
+					// Player touched enemy
+					player.die();
+				}
+			}
+		}
+	};
+	self.defeat = function () {
+		if (!self.defeated) {
+			self.defeated = true;
+			LK.setScore(LK.getScore() + 50);
+			scoreTxt.setText(LK.getScore());
+			LK.getSound('enemy_defeat').play();
+			tween(self, {
+				scaleY: 0.1,
+				alpha: 0
+			}, {
+				duration: 500,
+				onFinish: function onFinish() {
+					self.destroy();
+				}
+			});
+		}
+	};
+	return self;
+});
+var Flag = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('flag', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.update = function () {
+		if (self.intersects(player)) {
+			LK.setScore(LK.getScore() + 500);
+			LK.showYouWin();
+		}
+	};
+	return self;
+});
+var Platform = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('platform', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	return self;
+});
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var graphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.velocityX = 0;
+	self.velocityY = 0;
+	self.onGround = false;
+	self.speed = 8;
+	self.jumpPower = 20;
+	self.gravity = 0.8;
+	self.maxFallSpeed = 15;
+	self.lives = 3;
+	self.update = function () {
+		// Apply gravity
+		if (!self.onGround) {
+			self.velocityY += self.gravity;
+			if (self.velocityY > self.maxFallSpeed) {
+				self.velocityY = self.maxFallSpeed;
+			}
+		}
+		// Apply movement
+		self.x += self.velocityX;
+		self.y += self.velocityY;
+		// Reset ground state
+		self.onGround = false;
+		// Check platform collisions
+		for (var i = 0; i < platforms.length; i++) {
+			var platform = platforms[i];
+			if (self.intersects(platform)) {
+				if (self.velocityY > 0 && self.y - 40 < platform.y) {
+					self.y = platform.y;
+					self.velocityY = 0;
+					self.onGround = true;
+				}
+			}
+		}
+		// Check ground collision
+		if (self.y >= groundLevel) {
+			self.y = groundLevel;
+			self.velocityY = 0;
+			self.onGround = true;
+		}
+		// Check if fell off screen
+		if (self.y > 2732 + 100) {
+			self.die();
+		}
+		// Apply friction
+		self.velocityX *= 0.85;
+	};
+	self.jump = function () {
+		if (self.onGround) {
+			self.velocityY = -self.jumpPower;
+			self.onGround = false;
+			LK.getSound('jump').play();
+		}
+	};
+	self.moveLeft = function () {
+		self.velocityX = -self.speed;
+	};
+	self.moveRight = function () {
+		self.velocityX = self.speed;
+	};
+	self.die = function () {
+		self.lives--;
+		if (self.lives <= 0) {
+			LK.showGameOver();
+		} else {
+			self.respawn();
+		}
+	};
+	self.respawn = function () {
+		self.x = 200;
+		self.y = groundLevel;
+		self.velocityX = 0;
+		self.velocityY = 0;
+		LK.effects.flashObject(self, 0xffffff, 1000);
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var groundLevel = 2600;
+var platforms = [];
+var coins = [];
+var enemies = [];
+var player;
+var flag;
+var scoreTxt;
+var livesTxt;
+var dragStartX = 0;
+var isDragging = false;
+var lastTouchX = 0;
+// Create ground
+for (var i = 0; i < 12; i++) {
+	var groundTile = LK.getAsset('ground', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	groundTile.x = i * 200 + 100;
+	groundTile.y = groundLevel + 30;
+	game.addChild(groundTile);
+}
+// Create platforms
+var platformPositions = [{
+	x: 400,
+	y: 2400
+}, {
+	x: 700,
+	y: 2200
+}, {
+	x: 1100,
+	y: 2000
+}, {
+	x: 1500,
+	y: 1800
+}, {
+	x: 1800,
+	y: 1600
+}];
+for (var i = 0; i < platformPositions.length; i++) {
+	var platform = new Platform();
+	platform.x = platformPositions[i].x;
+	platform.y = platformPositions[i].y;
+	platforms.push(platform);
+	game.addChild(platform);
+}
+// Create coins
+var coinPositions = [{
+	x: 300,
+	y: 2500
+}, {
+	x: 400,
+	y: 2300
+}, {
+	x: 700,
+	y: 2100
+}, {
+	x: 1100,
+	y: 1900
+}, {
+	x: 1500,
+	y: 1700
+}, {
+	x: 1800,
+	y: 1500
+}];
+for (var i = 0; i < coinPositions.length; i++) {
+	var coin = new Coin();
+	coin.x = coinPositions[i].x;
+	coin.y = coinPositions[i].y;
+	coins.push(coin);
+	game.addChild(coin);
+}
+// Create enemies
+var enemyPositions = [{
+	x: 600,
+	y: groundLevel
+}, {
+	x: 1200,
+	y: groundLevel
+}, {
+	x: 1600,
+	y: groundLevel
+}];
+for (var i = 0; i < enemyPositions.length; i++) {
+	var enemy = new Enemy();
+	enemy.x = enemyPositions[i].x;
+	enemy.y = enemyPositions[i].y;
+	enemies.push(enemy);
+	game.addChild(enemy);
+}
+// Create player
+player = new Player();
+player.x = 200;
+player.y = groundLevel;
+game.addChild(player);
+// Create flag
+flag = new Flag();
+flag.x = 1900;
+flag.y = groundLevel;
+game.addChild(flag);
+// Create UI
+scoreTxt = new Text2('0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+scoreTxt.setText(LK.getScore());
+LK.gui.top.addChild(scoreTxt);
+livesTxt = new Text2('Lives: 3', {
+	size: 50,
+	fill: 0xFFFFFF
+});
+livesTxt.anchor.set(0, 0);
+livesTxt.x = 120;
+livesTxt.y = 20;
+LK.gui.topLeft.addChild(livesTxt);
+// Camera follow player
+var camera = {
+	x: 0,
+	y: 0
+};
+function updateCamera() {
+	camera.x = player.x - 1024;
+	camera.y = player.y - 1800;
+	// Clamp camera bounds
+	if (camera.x < 0) camera.x = 0;
+	if (camera.x > 400) camera.x = 400;
+	if (camera.y > -500) camera.y = -500;
+	if (camera.y < -1200) camera.y = -1200;
+	game.x = -camera.x;
+	game.y = -camera.y;
+}
+// Touch controls
+game.down = function (x, y, obj) {
+	isDragging = true;
+	dragStartX = x + camera.x;
+	lastTouchX = x + camera.x;
+	// Check if tap is for jumping
+	if (y > 2000) {
+		player.jump();
+	}
+};
+game.move = function (x, y, obj) {
+	if (isDragging) {
+		var currentX = x + camera.x;
+		var deltaX = currentX - lastTouchX;
+		if (deltaX > 5) {
+			player.moveRight();
+		} else if (deltaX < -5) {
+			player.moveLeft();
+		}
+		lastTouchX = currentX;
+	}
+};
+game.up = function (x, y, obj) {
+	isDragging = false;
+};
+game.update = function () {
+	updateCamera();
+	// Update lives display
+	livesTxt.setText('Lives: ' + player.lives);
+	// Remove destroyed coins
+	for (var i = coins.length - 1; i >= 0; i--) {
+		if (coins[i].collected) {
+			coins.splice(i, 1);
+		}
+	}
+	// Remove destroyed enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		if (enemies[i].defeated) {
+			enemies.splice(i, 1);
+		}
+	}
+};
\ No newline at end of file