/**** 
* Classes
****/ 
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -5;
	self.update = function () {
		self.y += self.speed;
	};
});
// The assets will be automatically created and loaded by the LK engine.
// Car class
var Car = Container.expand(function () {
	var self = Container.call(this);
	var carGraphics = self.attachAsset('car', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.x += self.speed;
		if (self.x > 2048) {
			self.x = -carGraphics.width;
		}
	};
	self.down = function (x, y, obj) {
		var bullet = game.addChild(new Bullet());
		bullet.x = self.x;
		bullet.y = self.y;
	};
});
// Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -3;
	self.update = function () {
		self.y += self.speed;
		if (self.y < -obstacleGraphics.height) {
			self.y = 2732;
		}
	};
});

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

/**** 
* Game Code
****/ 
var car = game.addChild(new Car());
car.x = 1024;
car.y = 2732 - 200;
var obstacles = [];
for (var i = 0; i < 5; i++) {
	var obstacle = game.addChild(new Obstacle());
	obstacle.x = Math.random() * 2048;
	obstacle.y = Math.random() * 2732;
	obstacles.push(obstacle);
}
game.update = function () {
	for (var i = 0; i < obstacles.length; i++) {
		if (car.intersects(obstacles[i])) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	}
	// Removed bullet firing from game update function
};
game.move = function (x, y, obj) {
	car.x = x;
	car.y = y;
};

===================================================================
--- original.js
+++ change.js
@@ -27,8 +27,13 @@
 		if (self.x > 2048) {
 			self.x = -carGraphics.width;
 		}
 	};
+	self.down = function (x, y, obj) {
+		var bullet = game.addChild(new Bullet());
+		bullet.x = self.x;
+		bullet.y = self.y;
+	};
 });
 // Obstacle class
 var Obstacle = Container.expand(function () {
 	var self = Container.call(this);
@@ -71,14 +76,9 @@
 			LK.effects.flashScreen(0xff0000, 1000);
 			LK.showGameOver();
 		}
 	}
-	// Fire bullet every 30 ticks
-	if (LK.ticks % 30 == 0) {
-		var bullet = game.addChild(new Bullet());
-		bullet.x = car.x;
-		bullet.y = car.y;
-	}
+	// Removed bullet firing from game update function
 };
 game.move = function (x, y, obj) {
 	car.x = x;
 	car.y = y;