/**** 
* Classes
****/ 
// Asteroid class
var Asteroid = Container.expand(function () {
	var self = Container.call(this);
	var asteroidGraphics = self.attachAsset('asteroid', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 15;
	self.rotationSpeed = 0.02;
	self.update = function () {
		self.y += self.speed;
		self.rotation += self.rotationSpeed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		rotation: 0.785398 // Rotate by 45 degrees to the right
	});
	self.speed = -15;
	self.update = function () {
		self.y += self.speed;
		if (self.y < 0) {
			self.destroy();
		}
	};
});
// Enemy class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	enemyGraphics.rotation = -0.785398; // Rotate by 90 degrees to the left
	self.speed = 7;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// EnemyBullet class
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		rotation: -0.785398 // Rotate by 45 degrees to the left
	});
	self.speed = 15;
	self.update = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// Explosion class
var Explosion = Container.expand(function () {
	var self = Container.call(this);
	var explosionGraphics = self.attachAsset('explosion', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		// Reduce the size of the explosion over time
		self.scale.x -= 0.01;
		self.scale.y -= 0.01;
		// Once the explosion has disappeared, destroy it
		if (self.scale.x <= 0 || self.scale.y <= 0) {
			self.destroy();
		}
	};
});
//<Assets used in the game will automatically appear here>
// Hero class
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		// Hero update logic
	};
});

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

/**** 
* Game Code
****/ 
// Function for enemies to shoot bullets
function shootEnemyBullet(enemy) {
	var bullet = new EnemyBullet();
	bullet.x = enemy.x;
	bullet.y = enemy.y + 50;
	enemyBullets.push(bullet);
	game.addChild(bullet);
}
// Initialize hero
var hero = game.addChild(new Hero());
hero.x = 2048 / 2;
hero.y = 2732 - 400;
// Initialize arrays for asteroids, enemies, hero bullets, and enemy bullets
var asteroids = [];
var enemies = [];
var heroBullets = [];
var enemyBullets = [];
// Function to handle hero movement
function handleMove(x, y, obj) {
	hero.x = x;
}
// Function to shoot hero bullets
function shootHeroBullet() {
	var bullet = new HeroBullet();
	bullet.x = hero.x;
	bullet.y = hero.y - 50;
	heroBullets.push(bullet);
	game.addChild(bullet);
}
// Function to spawn asteroids
function spawnAsteroid() {
	var asteroid = new Asteroid();
	asteroid.x = Math.random() * 2048;
	asteroid.y = -50;
	asteroids.push(asteroid);
	game.addChild(asteroid);
}
// Function to spawn enemies
function spawnEnemy() {
	var enemy = new Enemy();
	enemy.x = Math.random() * 2048;
	enemy.y = -50;
	enemies.push(enemy);
	game.addChild(enemy);
}
// Handle game move event
game.move = handleMove;
// Handle game down event to shoot hero bullets
game.down = function (x, y, obj) {
	shootHeroBullet();
};
// Update game logic
game.update = function () {
	// Update asteroids
	for (var i = asteroids.length - 1; i >= 0; i--) {
		asteroids[i].update();
		if (asteroids[i].intersects(hero)) {
			LK.effects.flashScreen(0xff0000, 1000);
			// Create an explosion at the point of collision
			var explosion = new Explosion();
			explosion.x = hero.x;
			explosion.y = hero.y;
			game.addChild(explosion);
			// Make the hero vanish off the screen
			hero.x = -1000;
			hero.y = -1000;
			LK.setTimeout(function () {
				LK.showGameOver();
			}, 3000);
		}
	}
	// Update enemies
	for (var j = enemies.length - 1; j >= 0; j--) {
		enemies[j].update();
		if (enemies[j].intersects(hero)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
		// Make enemies shoot bullets periodically
		if (LK.ticks % 120 == 0) {
			shootEnemyBullet(enemies[j]);
		}
	}
	// Update hero bullets
	for (var k = heroBullets.length - 1; k >= 0; k--) {
		heroBullets[k].update();
		for (var l = enemies.length - 1; l >= 0; l--) {
			if (heroBullets[k].intersects(enemies[l])) {
				heroBullets[k].destroy();
				enemies[l].destroy();
				heroBullets.splice(k, 1);
				enemies.splice(l, 1);
				break;
			}
		}
	}
	// Update enemy bullets
	for (var m = enemyBullets.length - 1; m >= 0; m--) {
		enemyBullets[m].update();
		if (enemyBullets[m].intersects(hero)) {
			LK.effects.flashScreen(0xff0000, 1000);
			// Create an explosion at the point of collision
			var explosion = new Explosion();
			explosion.x = hero.x;
			explosion.y = hero.y;
			game.addChild(explosion);
			// Make the hero vanish off the screen
			hero.x = -1000;
			hero.y = -1000;
			LK.setTimeout(function () {
				LK.showGameOver();
			}, 3000);
			enemyBullets[m].destroy();
			enemyBullets.splice(m, 1);
			break;
		}
	}
	// Spawn asteroids and enemies periodically
	if (LK.ticks % 60 == 0) {
		spawnAsteroid();
	}
	if (LK.ticks % 120 == 0) {
		spawnEnemy();
	}
};

===================================================================
--- original.js
+++ change.js
@@ -42,16 +42,26 @@
 		anchorY: 0.5
 	});
 	enemyGraphics.rotation = -0.785398; // Rotate by 90 degrees to the left
 	self.speed = 7;
-	self.direction = Math.random() < 0.5 ? -1 : 1; // Randomly set direction to left (-1) or right (1)
 	self.update = function () {
 		self.y += self.speed;
-		self.x += self.direction * 5; // Move the enemy to the side based on the direction
-		// If the enemy hits the side of the screen, reverse direction
-		if (self.x < 0 || self.x > 2048) {
-			self.direction *= -1;
+		if (self.y > 2732) {
+			self.destroy();
 		}
+	};
+});
+// EnemyBullet class
+var EnemyBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		rotation: -0.785398 // Rotate by 45 degrees to the left
+	});
+	self.speed = 15;
+	self.update = function () {
+		self.y += self.speed;
 		if (self.y > 2732) {
 			self.destroy();
 		}
 	};
@@ -96,26 +106,35 @@
 
 /**** 
 * Game Code
 ****/ 
+// Function for enemies to shoot bullets
+function shootEnemyBullet(enemy) {
+	var bullet = new EnemyBullet();
+	bullet.x = enemy.x;
+	bullet.y = enemy.y + 50;
+	enemyBullets.push(bullet);
+	game.addChild(bullet);
+}
 // Initialize hero
 var hero = game.addChild(new Hero());
 hero.x = 2048 / 2;
 hero.y = 2732 - 400;
-// Initialize arrays for asteroids, enemies, and bullets
+// Initialize arrays for asteroids, enemies, hero bullets, and enemy bullets
 var asteroids = [];
 var enemies = [];
-var bullets = [];
+var heroBullets = [];
+var enemyBullets = [];
 // Function to handle hero movement
 function handleMove(x, y, obj) {
 	hero.x = x;
 }
-// Function to shoot bullets
-function shootBullet() {
-	var bullet = new Bullet();
+// Function to shoot hero bullets
+function shootHeroBullet() {
+	var bullet = new HeroBullet();
 	bullet.x = hero.x;
 	bullet.y = hero.y - 50;
-	bullets.push(bullet);
+	heroBullets.push(bullet);
 	game.addChild(bullet);
 }
 // Function to spawn asteroids
 function spawnAsteroid() {
@@ -134,11 +153,11 @@
 	game.addChild(enemy);
 }
 // Handle game move event
 game.move = handleMove;
-// Handle game down event to shoot bullets
+// Handle game down event to shoot hero bullets
 game.down = function (x, y, obj) {
-	shootBullet();
+	shootHeroBullet();
 };
 // Update game logic
 game.update = function () {
 	// Update asteroids
@@ -164,35 +183,48 @@
 		enemies[j].update();
 		if (enemies[j].intersects(hero)) {
 			LK.effects.flashScreen(0xff0000, 1000);
 			LK.showGameOver();
-		} else {
-			// Check if the enemy collides with any asteroid
-			for (var m = asteroids.length - 1; m >= 0; m--) {
-				if (enemies[j].intersects(asteroids[m])) {
-					// Destroy the enemy and the asteroid
-					enemies[j].destroy();
-					asteroids[m].destroy();
-					enemies.splice(j, 1);
-					asteroids.splice(m, 1);
-					break;
-				}
-			}
 		}
+		// Make enemies shoot bullets periodically
+		if (LK.ticks % 120 == 0) {
+			shootEnemyBullet(enemies[j]);
+		}
 	}
-	// Update bullets
-	for (var k = bullets.length - 1; k >= 0; k--) {
-		bullets[k].update();
+	// Update hero bullets
+	for (var k = heroBullets.length - 1; k >= 0; k--) {
+		heroBullets[k].update();
 		for (var l = enemies.length - 1; l >= 0; l--) {
-			if (bullets[k].intersects(enemies[l])) {
-				bullets[k].destroy();
+			if (heroBullets[k].intersects(enemies[l])) {
+				heroBullets[k].destroy();
 				enemies[l].destroy();
-				bullets.splice(k, 1);
+				heroBullets.splice(k, 1);
 				enemies.splice(l, 1);
 				break;
 			}
 		}
 	}
+	// Update enemy bullets
+	for (var m = enemyBullets.length - 1; m >= 0; m--) {
+		enemyBullets[m].update();
+		if (enemyBullets[m].intersects(hero)) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			// Create an explosion at the point of collision
+			var explosion = new Explosion();
+			explosion.x = hero.x;
+			explosion.y = hero.y;
+			game.addChild(explosion);
+			// Make the hero vanish off the screen
+			hero.x = -1000;
+			hero.y = -1000;
+			LK.setTimeout(function () {
+				LK.showGameOver();
+			}, 3000);
+			enemyBullets[m].destroy();
+			enemyBullets.splice(m, 1);
+			break;
+		}
+	}
 	// Spawn asteroids and enemies periodically
 	if (LK.ticks % 60 == 0) {
 		spawnAsteroid();
 	}