===================================================================
--- original.js
+++ change.js
@@ -31,8 +31,23 @@
 			self.direction *= -1;
 		}
 	};
 });
+// EnemyBullet class
+var EnemyBullet = 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 > 2732 + bulletGraphics.height / 2) {
+			self.destroy();
+		}
+	};
+});
 //<Assets used in the game will automatically appear here>
 // Spacecraft class for player
 var Spacecraft = Container.expand(function () {
 	var self = Container.call(this);
@@ -78,8 +93,9 @@
 	// Show game over. The game will be automatically paused while game over is showing.
 	LK.showGameOver(); // Calling this will destroy the 'Game' and reset entire game state.
 }
 var bullets = [];
+var enemyBullets = [];
 var player = new Spacecraft();
 player.x = 2048 / 2;
 player.y = 2732 - 150;
 game.addChild(player);
@@ -94,8 +110,17 @@
 };
 // Update game state
 game.update = function () {
 	enemy.update();
+	// Enemy shooting logic
+	if (LK.ticks % 60 === 0) {
+		// Enemy shoots every second
+		var enemyBullet = new EnemyBullet();
+		enemyBullet.x = enemy.x;
+		enemyBullet.y = enemy.y + enemyGraphics.height / 2;
+		game.addChild(enemyBullet);
+		enemyBullets.push(enemyBullet);
+	}
 	for (var i = bullets.length - 1; i >= 0; i--) {
 		bullets[i].update();
 		if (bullets[i].intersects(enemy)) {
 			// Declare victory
@@ -106,5 +131,20 @@
 			bullets[i].destroy();
 			bullets.splice(i, 1);
 		}
 	}
+	// Check for collision between enemy bullets and player
+	for (var j = enemyBullets.length - 1; j >= 0; j--) {
+		enemyBullets[j].update();
+		if (enemyBullets[j].intersects(player)) {
+			// Flash screen red for 1 second (1000ms) to show defeat.
+			LK.effects.flashScreen(0xff0000, 1000);
+			// Show game over. The game will be automatically paused while game over is showing.
+			LK.showGameOver(); // Calling this will destroy the 'Game' and reset entire game state.
+			return; // Exit the update loop
+		}
+		if (enemyBullets[j].y > 2732 + 50) {
+			enemyBullets[j].destroy();
+			enemyBullets.splice(j, 1);
+		}
+	}
 };
\ No newline at end of file