===================================================================
--- original.js
+++ change.js
@@ -7,9 +7,71 @@
 	bestTime: 0
 });
 
 /**** 
+* Classes
+****/ 
+var Car = Container.expand(function () {
+	var self = Container.call(this);
+	var carGraphics = self.attachAsset('playerCar', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		self.y -= self.speed;
+	};
+	return self;
+});
+var EnemyCar = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyCarGraphics = self.attachAsset('enemyCar', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
 ****/ 
 var game = new LK.Game({
 	backgroundColor: 0x000000
-});
\ No newline at end of file
+});
+
+/**** 
+* Game Code
+****/ 
+var playerCar = game.addChild(new Car());
+playerCar.x = 1024; // Centered in the left lane
+playerCar.y = 2400; // Start near the bottom
+var enemyCars = [];
+function spawnEnemyCar() {
+	var enemyCar = new EnemyCar();
+	enemyCar.x = Math.random() > 0.5 ? 512 : 1536; // Randomly choose a lane
+	enemyCar.y = -100; // Start above the screen
+	enemyCars.push(enemyCar);
+	game.addChild(enemyCar);
+}
+game.update = function () {
+	playerCar.update();
+	for (var i = enemyCars.length - 1; i >= 0; i--) {
+		var enemyCar = enemyCars[i];
+		enemyCar.update();
+		if (enemyCar.y > 2832) {
+			// If the enemy car goes off the screen
+			enemyCar.destroy();
+			enemyCars.splice(i, 1);
+		}
+		if (playerCar.intersects(enemyCar)) {
+			LK.showGameOver();
+		}
+	}
+	if (LK.ticks % 60 == 0) {
+		// Spawn a new enemy car every second
+		spawnEnemyCar();
+	}
+};
\ No newline at end of file