===================================================================
--- original.js
+++ change.js
@@ -1,101 +1,103 @@
-/****
+/**** 
 * Classes
-****/
+****/ 
 // Define a 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;
-    if (self.y < -bulletGraphics.height) {
-      self.destroy();
-    }
-  };
+	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;
+		if (self.y < -bulletGraphics.height) {
+			self.destroy();
+		}
+	};
 });
 // Define a Hero class
 var Hero = Container.expand(function () {
-  var self = Container.call(this);
-  var heroGraphics = self.attachAsset('hero', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.shoot = function () {
-    var bullet = new Bullet();
-    bullet.x = self.x;
-    bullet.y = self.y - heroGraphics.height / 2;
-    bullets.push(bullet);
-    game.addChild(bullet);
-  };
+	var self = Container.call(this);
+	var heroGraphics = self.attachAsset('hero', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.shoot = function () {
+		var bullet = new Bullet();
+		bullet.x = self.x;
+		bullet.y = self.y - heroGraphics.height / 2;
+		bullets.push(bullet);
+		game.addChild(bullet);
+	};
 });
 // Assets will be automatically created and loaded by the LK engine based on their usage in the code.
 // Define a Zombie class
 var Zombie = Container.expand(function () {
-  var self = Container.call(this);
-  var zombieGraphics = self.attachAsset('zombie', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 2;
-  self.update = function () {
-    self.y += self.speed;
-    if (self.y > 2732) {
-      self.y = -zombieGraphics.height;
-      self.x = Math.random() * 2048;
-    }
-  };
+	var self = Container.call(this);
+	var zombieGraphics = self.attachAsset('zombie', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 2;
+	self.update = function () {
+		self.y += self.speed;
+		if (self.y > 2732) {
+			self.respawn();
+		}
+	};
+	self.respawn = function () {
+		self.y = -zombieGraphics.height;
+		self.x = Math.random() * 2048;
+	};
 });
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 // Init game with black background
+	backgroundColor: 0x000000 // Init game with black background
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Initialize game variables
 var hero = new Hero();
 hero.x = 2048 / 2;
 hero.y = 2732 - 150;
 game.addChild(hero);
 var zombies = [];
 for (var i = 0; i < 5; i++) {
-  var zombie = new Zombie();
-  zombie.x = Math.random() * 2048;
-  zombie.y = Math.random() * 2732;
-  zombies.push(zombie);
-  game.addChild(zombie);
+	var zombie = new Zombie();
+	zombie.x = Math.random() * 2048;
+	zombie.y = Math.random() * 2732;
+	zombies.push(zombie);
+	game.addChild(zombie);
 }
 var bullets = [];
 // Handle game updates
 game.update = function () {
-  for (var i = bullets.length - 1; i >= 0; i--) {
-    bullets[i].update();
-    for (var j = zombies.length - 1; j >= 0; j--) {
-      if (bullets[i].intersects(zombies[j])) {
-        bullets[i].destroy();
-        bullets.splice(i, 1);
-        zombies[j].destroy();
-        zombies.splice(j, 1);
-        break;
-      }
-    }
-  }
-  for (var k = 0; k < zombies.length; k++) {
-    zombies[k].update();
-    if (zombies[k].intersects(hero)) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-    }
-  }
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		bullets[i].update();
+		for (var j = zombies.length - 1; j >= 0; j--) {
+			if (bullets[i].intersects(zombies[j])) {
+				bullets[i].destroy();
+				bullets.splice(i, 1);
+				zombies[j].respawn();
+				break;
+			}
+		}
+	}
+	for (var k = 0; k < zombies.length; k++) {
+		zombies[k].update();
+		if (zombies[k].intersects(hero)) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+		}
+	}
 };
 // Handle touch events for shooting
 game.down = function (x, y, obj) {
-  hero.shoot();
+	hero.shoot();
 };
\ No newline at end of file