===================================================================
--- original.js
+++ change.js
@@ -1,55 +1,55 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Bot class
 var Bot = Container.expand(function () {
-  var self = Container.call(this);
-  var botGraphics = self.attachAsset('bot', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 3;
-  self.update = function () {
-    // Bot movement logic goes here
-  };
+	var self = Container.call(this);
+	var botGraphics = self.attachAsset('bot', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 3;
+	self.update = function () {
+		// Bot movement logic goes here
+	};
 });
 // 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 = 10;
-  self.update = function () {
-    self.y -= self.speed;
-  };
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 10;
+	self.update = function () {
+		self.y -= self.speed;
+	};
 });
 // The assets will be automatically created and loaded by the LK engine
 // Player class
 var Player = Container.expand(function () {
-  var self = Container.call(this);
-  var playerGraphics = self.attachAsset('player', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 5;
-  self.update = function () {
-    // Player movement logic goes here
-  };
+	var self = Container.call(this);
+	var playerGraphics = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		// Player movement logic goes here
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x000000 //Init game with black background 
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Initialize player
 var player = game.addChild(new Player());
 player.x = 2048 / 2;
 player.y = 2732 - 100;
@@ -57,51 +57,51 @@
 var bots = [];
 var bullets = [];
 // Game update function
 game.update = function () {
-  // Update player
-  player.update();
-  // Update bots
-  for (var i = 0; i < bots.length; i++) {
-    bots[i].update();
-  }
-  // Update bullets
-  for (var i = 0; i < bullets.length; i++) {
-    bullets[i].update();
-  }
-  // Collision detection
-  for (var i = 0; i < bots.length; i++) {
-    for (var j = 0; j < bullets.length; j++) {
-      if (bots[i].intersects(bullets[j])) {
-        bots[i].destroy();
-        bullets[j].destroy();
-        bots.splice(i, 1);
-        bullets.splice(j, 1);
-        break;
-      }
-    }
-  }
-  // Spawn bots
-  if (LK.ticks % 120 == 0) {
-    var bot = new Bot();
-    bot.x = Math.random() * 2048;
-    bot.y = 0;
-    bots.push(bot);
-    game.addChild(bot);
-  }
+	// Update player
+	player.update();
+	// Update bots
+	for (var i = 0; i < bots.length; i++) {
+		bots[i].update();
+	}
+	// Update bullets
+	for (var i = 0; i < bullets.length; i++) {
+		bullets[i].update();
+	}
+	// Collision detection
+	for (var i = bots.length - 1; i >= 0; i--) {
+		for (var j = bullets.length - 1; j >= 0; j--) {
+			if (bots[i].intersects(bullets[j])) {
+				bots[i].destroy();
+				bullets[j].destroy();
+				bots.splice(i, 1);
+				bullets.splice(j, 1);
+				break;
+			}
+		}
+	}
+	// Spawn bots
+	if (LK.ticks % 120 == 0) {
+		var bot = new Bot();
+		bot.x = Math.random() * 2048;
+		bot.y = 0;
+		bots.push(bot);
+		game.addChild(bot);
+	}
 };
 // Player control
 game.down = function (x, y, obj) {
-  player.x = x;
-  player.y = y;
+	player.x = x;
+	player.y = y;
 };
 game.move = function (x, y, obj) {
-  player.x = x;
-  player.y = y;
+	player.x = x;
+	player.y = y;
 };
 game.up = function (x, y, obj) {
-  var bullet = new Bullet();
-  bullet.x = player.x;
-  bullet.y = player.y;
-  bullets.push(bullet);
-  game.addChild(bullet);
+	var bullet = new Bullet();
+	bullet.x = player.x;
+	bullet.y = player.y;
+	bullets.push(bullet);
+	game.addChild(bullet);
 };
\ No newline at end of file