===================================================================
--- original.js
+++ change.js
@@ -1,8 +1,7 @@
 /**** 
 * Classes
 ****/ 
-// Bullet class representing enemy bullets
 var Bullet = Container.expand(function () {
 	var self = Container.call(this);
 	var bulletGraphics = self.attachAsset('bullet', {
 		anchorX: 0.5,
@@ -28,9 +27,30 @@
 	self.move = function (x, y) {
 		self.x = x;
 		self.y = y;
 	};
+	// Method to shoot a bullet
+	self.shoot = function () {
+		var bullet = new PlayerBullet();
+		bullet.x = self.x;
+		bullet.y = self.y;
+		game.addChild(bullet);
+		playerBullets.push(bullet);
+	};
 });
+// PlayerBullet class representing the player's bullets
+var PlayerBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -5; // Bullet movement speed
+	// Update method called every game tick
+	self.update = function () {
+		self.y += self.speed;
+	};
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -47,8 +67,9 @@
 player.y = 2732 - 200;
 game.addChild(player);
 // Array to hold bullets
 var bullets = [];
+var playerBullets = [];
 // Function to spawn bullets
 function spawnBullet() {
 	var bullet = new Bullet();
 	bullet.x = Math.random() * 2048;
@@ -73,12 +94,26 @@
 			LK.showGameOver();
 		}
 	}
 	// Spawn a new bullet every 30 ticks
+	// Update player bullets
+	for (var i = playerBullets.length - 1; i >= 0; i--) {
+		var bullet = playerBullets[i];
+		bullet.update();
+		// Check if bullet is off-screen
+		if (bullet.y < 0) {
+			bullet.destroy();
+			playerBullets.splice(i, 1);
+		}
+	}
+	// Spawn a new enemy bullet every 30 ticks
 	if (LK.ticks % 30 === 0) {
 		spawnBullet();
 	}
 };
 // Handle player movement
 game.move = function (x, y, obj) {
 	player.move(x, y);
+};
+game.down = function (x, y, obj) {
+	player.shoot();
 };
\ No newline at end of file