===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,235 @@
-/****
+/**** 
+* Classes
+****/ 
+// Coin class
+var Coin = Container.expand(function () {
+	var self = Container.call(this);
+	var coinAsset = self.attachAsset('coin', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.width = coinAsset.width;
+	self.height = coinAsset.height;
+	self.update = function () {
+		// Optionally animate coin
+	};
+	return self;
+});
+// Enemy class
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyAsset = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	self.vx = -6;
+	self.width = enemyAsset.width;
+	self.height = enemyAsset.height;
+	self.update = function () {
+		self.x += self.vx;
+		if (self.lastX === undefined) self.lastX = self.x;
+	};
+	return self;
+});
+// Platform class
+var Platform = Container.expand(function () {
+	var self = Container.call(this);
+	var platAsset = self.attachAsset('platform', {
+		anchorX: 0,
+		anchorY: 0
+	});
+	self.width = platAsset.width;
+	self.height = platAsset.height;
+	return self;
+});
+// Player class
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerAsset = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	self.vx = 0;
+	self.vy = 0;
+	self.isOnGround = false;
+	self.width = playerAsset.width;
+	self.height = playerAsset.height;
+	self.update = function () {
+		// Gravity
+		self.vy += 2.5;
+		// Clamp vy
+		if (self.vy > 60) self.vy = 60;
+		self.x += self.vx;
+		self.y += self.vy;
+		// Save last position for collision checks
+		if (self.lastX === undefined) self.lastX = self.x;
+		if (self.lastY === undefined) self.lastY = self.y;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87ceeb // sky blue
+});
+
+/**** 
+* Game Code
+****/ 
+;
+// --- Game variables ---
+var player;
+var platforms = [];
+var coins = [];
+var enemies = [];
+var score = 0;
+var scoreTxt;
+var dragStartX = null;
+var dragStartY = null;
+var jumpQueued = false;
+// --- Setup game objects ---
+function setupLevel() {
+	// Player
+	player = new Player();
+	player.x = 300;
+	player.y = 2000;
+	game.addChild(player);
+	// Platforms
+	var plat1 = new Platform();
+	plat1.x = 200;
+	plat1.y = 2200;
+	game.addChild(plat1);
+	platforms.push(plat1);
+	var plat2 = new Platform();
+	plat2.x = 700;
+	plat2.y = 1800;
+	game.addChild(plat2);
+	platforms.push(plat2);
+	var plat3 = new Platform();
+	plat3.x = 1200;
+	plat3.y = 1500;
+	game.addChild(plat3);
+	platforms.push(plat3);
+	// Coins
+	var coin1 = new Coin();
+	coin1.x = 750;
+	coin1.y = 1700;
+	game.addChild(coin1);
+	coins.push(coin1);
+	var coin2 = new Coin();
+	coin2.x = 1250;
+	coin2.y = 1400;
+	game.addChild(coin2);
+	coins.push(coin2);
+	// Enemies
+	var enemy1 = new Enemy();
+	enemy1.x = 1000;
+	enemy1.y = 2200;
+	game.addChild(enemy1);
+	enemies.push(enemy1);
+	// Score text
+	scoreTxt = new Text2('0', {
+		size: 120,
+		fill: 0xFFF700
+	});
+	scoreTxt.anchor.set(0.5, 0);
+	LK.gui.top.addChild(scoreTxt);
+	scoreTxt.setText(score);
+}
+setupLevel();
+// --- Controls (touch drag left/right, tap to jump) ---
+game.down = function (x, y, obj) {
+	dragStartX = x;
+	dragStartY = y;
+	jumpQueued = false;
+};
+game.move = function (x, y, obj) {
+	if (dragStartX !== null) {
+		var dx = x - dragStartX;
+		if (Math.abs(dx) > 30) {
+			player.vx = dx > 0 ? 16 : -16;
+		} else {
+			player.vx = 0;
+		}
+	}
+};
+game.up = function (x, y, obj) {
+	if (dragStartX !== null && Math.abs(x - dragStartX) < 30 && Math.abs(y - dragStartY) < 30) {
+		// Tap: jump
+		jumpQueued = true;
+	}
+	dragStartX = null;
+	dragStartY = null;
+	player.vx = 0;
+};
+// --- Main game loop ---
+game.update = function () {
+	// Player update
+	player.update();
+	// Clamp player to screen
+	if (player.x < 0) player.x = 0;
+	if (player.x > 2048) player.x = 2048;
+	// Platform collision
+	player.isOnGround = false;
+	for (var i = 0; i < platforms.length; i++) {
+		var plat = platforms[i];
+		// Simple AABB collision, only check if falling
+		if (player.vy >= 0 && player.x + player.width / 2 > plat.x && player.x - player.width / 2 < plat.x + plat.width && player.y > plat.y && player.lastY <= plat.y) {
+			// Land on platform
+			player.y = plat.y;
+			player.vy = 0;
+			player.isOnGround = true;
+		}
+	}
+	// Jump
+	if (jumpQueued && player.isOnGround) {
+		player.vy = -48;
+		jumpQueued = false;
+	}
+	// Coin collection
+	for (var i = coins.length - 1; i >= 0; i--) {
+		var coin = coins[i];
+		if (player.intersects(coin)) {
+			score += 1;
+			scoreTxt.setText(score);
+			coin.destroy();
+			coins.splice(i, 1);
+		}
+	}
+	// Enemy update and collision
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var enemy = enemies[i];
+		enemy.update();
+		// Remove if off screen
+		if (enemy.x < -200) {
+			enemy.destroy();
+			enemies.splice(i, 1);
+			continue;
+		}
+		// Player/enemy collision
+		var wasIntersecting = enemy.lastWasIntersecting || false;
+		var isIntersecting = player.intersects(enemy);
+		if (!wasIntersecting && isIntersecting) {
+			// Check if player is falling onto enemy
+			if (player.vy > 0 && player.y < enemy.y) {
+				// Defeat enemy
+				enemy.destroy();
+				enemies.splice(i, 1);
+				player.vy = -32; // bounce
+				score += 5;
+				scoreTxt.setText(score);
+			} else {
+				// Player hit from side or below: game over
+				LK.effects.flashScreen(0xff0000, 1000);
+				LK.showGameOver();
+				return;
+			}
+		}
+		enemy.lastWasIntersecting = isIntersecting;
+	}
+	// Save lastY for player
+	player.lastY = player.y;
+	player.lastX = player.x;
+};
\ No newline at end of file