/**** 
* Classes
****/ 
var Bike = Container.expand(function () {
	var self = Container.call(this);
	var bikeGraphics = self.attachAsset('bike', {
		anchorX: 0,
		anchorY: -2.5,
		scaleX: 3,
		scaleY: 3
	});
	self.update = function () {
		self.x += 0.5;
		if (self.x > 2048) {
			self.x = -100;
		}
	};
	self.jumping = false;
	self.jumpCounter = 0;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1,
		scaleY: 1
	});
	self.speed = 10;
	self.update = function () {
		self.x += self.speed;
	};
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: -3,
		anchorY: -2.3,
		scaleX: 3,
		scaleY: 3
	});
	self.update = function () {
		self.x -= 10;
	};
});
var Obstacle2 = Container.expand(function () {
	var self = Container.call(this);
	var obstacle2Graphics = self.attachAsset('obstacle2', {
		anchorX: -3,
		anchorY: 2.3,
		scaleX: 2,
		scaleY: 2
	});
	self.update = function () {
		self.x -= 10;
		self.y += 5; // Add a default downward movement for obstacle2
	};
});
var Road = Container.expand(function () {
	var self = Container.call(this);
	var roadGraphics = self.attachAsset('road', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
var road = game.addChild(new Road());
road.x = 2048 / 2;
road.y = 2732 / 2;
var background1 = road;
var background2 = new Road();
game.addChild(background2);
background2.x = background1.x + 2048;
background2.y = 2732 / 2; // Position background2 at the center of the screen vertically
var bike = game.addChild(new Bike());
var obstacle = game.addChild(new Obstacle());
obstacle.x = 2048 / 2;
obstacle.y = 2732 / 2;
bike.x = 0;
bike.y = 2732 / 2;
var obstacle2; // Define obstacle2 in the global scope
var bullets = []; // Array to keep track of bullets
game.update = function () {
	background1.x -= 5;
	background2.x -= 5;
	if (background1.x <= -1024) {
		background1.x = background2.x + 2048;
	}
	if (background2.x <= -1024) {
		background2.x = background1.x + 2048;
	}
	if (LK.ticks % Math.floor(Math.random() * 1800) == 0) {
		var newObstacle = new Obstacle();
		newObstacle.x = 2048;
		newObstacle.y = 2732 / 2;
		game.addChild(newObstacle);
		obstacle2 = new Obstacle2();
		obstacle2.x = 2048;
		obstacle2.y = bike.y;
		game.addChild(obstacle2);
	}
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.x > 2048) {
			game.removeChild(bullet);
			bullets.splice(i, 1);
		} else if (bullet.intersects(obstacle2)) {
			game.removeChild(bullet);
			bullets.splice(i, 1);
			game.removeChild(obstacle2);
			obstacle2 = null;
		}
	}
	if (bike.intersects(obstacle2)) {
		LK.showGameOver();
	}
	if (bike.jumping) {
		bike.y -= 50;
		bike.jumpCounter++;
		if (bike.jumpCounter > 20) {
			bike.jumping = false;
		}
	} else if (bike.y < 2732 / 2) {
		bike.y += 15;
	} else {
		bike.jumpCounter = 0;
	}
};
game.down = function (x, y, obj) {
	if (!bike.jumping) {
		bike.jumping = true;
	}
	var bullet = new Bullet();
	bullet.x = bike.x;
	bullet.y = bike.y;
	game.addChild(bullet);
	bullets.push(bullet);
};

===================================================================
--- original.js
+++ change.js
@@ -17,8 +17,21 @@
 	};
 	self.jumping = false;
 	self.jumpCounter = 0;
 });
+var Bullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 1,
+		scaleY: 1
+	});
+	self.speed = 10;
+	self.update = function () {
+		self.x += self.speed;
+	};
+});
 var Obstacle = Container.expand(function () {
 	var self = Container.call(this);
 	var obstacleGraphics = self.attachAsset('obstacle', {
 		anchorX: -3,
@@ -75,8 +88,9 @@
 obstacle.y = 2732 / 2;
 bike.x = 0;
 bike.y = 2732 / 2;
 var obstacle2; // Define obstacle2 in the global scope
+var bullets = []; // Array to keep track of bullets
 game.update = function () {
 	background1.x -= 5;
 	background2.x -= 5;
 	if (background1.x <= -1024) {
@@ -85,22 +99,31 @@
 	if (background2.x <= -1024) {
 		background2.x = background1.x + 2048;
 	}
 	if (LK.ticks % Math.floor(Math.random() * 1800) == 0) {
-		// 60 ticks per second, so 1800 ticks = 30 seconds
 		var newObstacle = new Obstacle();
-		newObstacle.x = 2048; // spawn at the right edge of the screen
-		newObstacle.y = 2732 / 2; // spawn at the middle of the screen vertically
+		newObstacle.x = 2048;
+		newObstacle.y = 2732 / 2;
 		game.addChild(newObstacle);
-		obstacle2 = new Obstacle2(); // Assign the new Obstacle2 instance to the global obstacle2 variable
-		obstacle2.x = 2048; // spawn at the right edge of the screen
-		obstacle2.y = bike.y; // spawn at the player's vertical position
+		obstacle2 = new Obstacle2();
+		obstacle2.x = 2048;
+		obstacle2.y = bike.y;
 		game.addChild(obstacle2);
 	}
-	// Check if bike collides with obstacle2
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		var bullet = bullets[i];
+		if (bullet.x > 2048) {
+			game.removeChild(bullet);
+			bullets.splice(i, 1);
+		} else if (bullet.intersects(obstacle2)) {
+			game.removeChild(bullet);
+			bullets.splice(i, 1);
+			game.removeChild(obstacle2);
+			obstacle2 = null;
+		}
+	}
 	if (bike.intersects(obstacle2)) {
-		// Show game over. The game will be automatically paused while game over is showing.
-		LK.showGameOver(); // Calling this will destroy the 'Game' and reset entire game state.
+		LK.showGameOver();
 	}
 	if (bike.jumping) {
 		bike.y -= 50;
 		bike.jumpCounter++;
@@ -116,5 +139,10 @@
 game.down = function (x, y, obj) {
 	if (!bike.jumping) {
 		bike.jumping = true;
 	}
+	var bullet = new Bullet();
+	bullet.x = bike.x;
+	bullet.y = bike.y;
+	game.addChild(bullet);
+	bullets.push(bullet);
 };
\ No newline at end of file