/**** 
* Classes
****/ 
// Define a class for bullets
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 < 0) {
			self.destroy();
		}
	};
});
// Define a class for enemies
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Define a class for the player character
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 () {
		// Update logic for player
	};
});
// Define a class for the stars
var Star = Container.expand(function () {
	var self = Container.call(this);
	var starGraphics = self.attachAsset('star', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});

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

/**** 
* Game Code
****/ 
// Initialize enemies
var enemies = [];
for (var i = 0; i < 5; i++) {
	var enemy = new Enemy();
	enemy.x = Math.random() * 2048;
	enemy.y = Math.random() * 1000;
	enemies.push(enemy);
	game.addChild(enemy);
}
// Initialize bullets
var bullets = [];
// Initialize stars
var stars = [];
for (var i = 0; i < 50; i++) {
	var star = new Star();
	star.x = Math.random() * 2048;
	star.y = Math.random() * 2732;
	stars.push(star);
	game.addChild(star);
}
// Initialize player
var player = game.addChild(new Player());
player.x = 1024;
player.y = 2500;
// Handle player movement
game.move = function (x, y, obj) {
	player.x = x;
	player.y = y;
};
// Handle shooting
game.down = function (x, y, obj) {
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y;
	bullets.push(bullet);
	game.addChild(bullet);
};
// Update game state
game.update = function () {
	// Update player
	player.update();
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		enemies[i].update();
		if (enemies[i].y > 2732) {
			enemies.splice(i, 1);
			var newEnemy = new Enemy();
			newEnemy.x = Math.random() * 2048;
			newEnemy.y = 0;
			enemies.push(newEnemy);
			game.addChild(newEnemy);
		}
	}
	// Update bullets
	for (var j = bullets.length - 1; j >= 0; j--) {
		bullets[j].update();
		if (bullets[j].y < 0) {
			bullets.splice(j, 1);
		}
	}
	// Update stars
	for (var i = stars.length - 1; i >= 0; i--) {
		stars[i].update();
		if (stars[i].y > 2732) {
			stars.splice(i, 1);
			var newStar = new Star();
			newStar.x = Math.random() * 2048;
			newStar.y = 0;
			stars.push(newStar);
			game.addChildAt(newStar, 0);
		}
	}
	// Check for collisions
	for (var k = bullets.length - 1; k >= 0; k--) {
		for (var l = enemies.length - 1; l >= 0; l--) {
			if (bullets[k].intersects(enemies[l])) {
				bullets[k].destroy();
				enemies[l].destroy();
				bullets.splice(k, 1);
				enemies.splice(l, 1);
				break;
			}
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -26,10 +26,9 @@
 	self.speed = 3;
 	self.update = function () {
 		self.y += self.speed;
 		if (self.y > 2732) {
-			self.y = 0;
-			self.x = Math.random() * 2048;
+			self.destroy();
 		}
 	};
 });
 //<Assets used in the game will automatically appear here>
@@ -113,10 +112,18 @@
 game.update = function () {
 	// Update player
 	player.update();
 	// Update enemies
-	for (var i = 0; i < enemies.length; i++) {
+	for (var i = enemies.length - 1; i >= 0; i--) {
 		enemies[i].update();
+		if (enemies[i].y > 2732) {
+			enemies.splice(i, 1);
+			var newEnemy = new Enemy();
+			newEnemy.x = Math.random() * 2048;
+			newEnemy.y = 0;
+			enemies.push(newEnemy);
+			game.addChild(newEnemy);
+		}
 	}
 	// Update bullets
 	for (var j = bullets.length - 1; j >= 0; j--) {
 		bullets[j].update();