===================================================================
--- original.js
+++ change.js
@@ -3,20 +3,8 @@
 	var heroGraphics = self.createAsset('hero', 'Hero character', .5, .5);
 	self.move = function () {};
 	self.shoot = function () {};
 });
-var Enemy = Container.expand(function () {
-	var self = Container.call(this);
-	var enemyGraphics = self.createAsset('enemy', 'Enemy character', .5, .5);
-	self.move = function () {
-		self.x -= 5;
-		if (self.x < 0) {
-			self.x = 2048;
-			self.y = Math.random() * 2732;
-		}
-	};
-	self.attack = function () {};
-});
 var HeroBullet = Container.expand(function () {
 	var self = Container.call(this);
 	var bulletGraphics = self.createAsset('heroBullet', 'Hero Bullet', .5, .5);
 	self.move = function () {};
@@ -30,43 +18,15 @@
 	var self = Container.call(this);
 	LK.stageContainer.setBackgroundColor(0x008000);
 	var hero = self.addChild(new Hero());
 	var enemies = [];
-	for (var i = 0; i < 10; i++) {
-		var enemy = new Enemy();
-		var spawnSide = Math.floor(Math.random() * 4);
-		switch (spawnSide) {
-			case 0:
-				enemy.x = Math.random() * 2048;
-				enemy.y = 0;
-				break;
-			case 1:
-				enemy.x = Math.random() * 2048;
-				enemy.y = 2732;
-				break;
-			case 2:
-				enemy.x = 2048;
-				enemy.y = Math.random() * 2732;
-				break;
-			case 3:
-				enemy.x = 0;
-				enemy.y = Math.random() * 2732;
-				break;
-		}
-		enemies.push(enemy);
-		self.addChild(enemy);
-	}
 	var heroBullets = [];
 	var enemyBullets = [];
 	hero.x = 2048 / 2;
 	hero.y = 2732 / 2;
 	LK.on('tick', function () {
 		hero.move();
 		hero.shoot();
-		for (var i = 0; i < enemies.length; i++) {
-			enemies[i].move();
-			enemies[i].attack();
-		}
 		for (var i = 0; i < heroBullets.length; i++) {
 			heroBullets[i].move();
 		}
 		for (var i = 0; i < enemyBullets.length; i++) {