===================================================================
--- original.js
+++ change.js
@@ -44,8 +44,19 @@
 	self.update = function () {
 		self.y += self.speed;
 	};
 });
+// Define the Heart class
+var Heart = Container.expand(function () {
+	var self = Container.call(this);
+	var heartGraphics = self.attachAsset('heart', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.update = function () {
+		// Heart update logic, if any
+	};
+});
 //<Assets used in the game will automatically appear here>
 //<Write imports for supported plugins here>
 // Define the Player class
 var Player = Container.expand(function () {
@@ -138,8 +149,26 @@
 				break;
 			}
 		}
 	}
+	// Check if all enemies are destroyed
+	if (enemies.length === 0) {
+		// Spawn more enemies
+		for (var i = 0; i < 5; i++) {
+			var newEnemy = new Enemy();
+			newEnemy.x = 400 + i * 300;
+			newEnemy.y = 100 + Math.random() * 200;
+			enemies.push(newEnemy);
+			game.addChild(newEnemy);
+		}
+		// Spawn hearts
+		for (var h = 0; h < 3; h++) {
+			var heart = new Heart();
+			heart.x = Math.random() * 2048;
+			heart.y = Math.random() * 1000;
+			game.addChild(heart);
+		}
+	}
 	// Check for collision with enemy bullets
 	for (var l = game.children.length - 1; l >= 0; l--) {
 		var child = game.children[l];
 		if (child instanceof EnemyBullet && child.intersects(player)) {