===================================================================
--- original.js
+++ change.js
@@ -1,67 +1,85 @@
-/****
+/**** 
 * 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;
-    }
-  };
+	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;
+		}
+	};
 });
 // 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;
-    }
-  };
+	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 
+	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);
+	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();
-    }
-  }
+	for (var i = 0; i < obstacles.length; i++) {
+		if (car.intersects(obstacles[i])) {
+			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;
+	}
 };
 game.move = function (x, y, obj) {
-  car.x = x;
-  car.y = y;
+	car.x = x;
+	car.y = y;
 };
\ No newline at end of file