/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
// Enemy Bullet
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bullet = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 18;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Enemy Ship
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var enemy = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = enemy.width;
	self.height = enemy.height;
	self.speedY = 6 + Math.random() * 4;
	self.speedX = (Math.random() - 0.5) * 6;
	self.shootCooldown = 60 + Math.floor(Math.random() * 60);
	// Add health property for 2 hearts
	self.health = 2;
	self.update = function () {
		self.y += self.speedY;
		self.x += self.speedX;
		if (self.x < self.width / 2) {
			self.x = self.width / 2;
			self.speedX *= -1;
		}
		if (self.x > 2048 - self.width / 2) {
			self.x = 2048 - self.width / 2;
			self.speedX *= -1;
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	// Method to take damage
	self.takeDamage = function () {
		self.health--;
		if (self.health <= 0) {
			return true; // destroyed
		}
		return false; // still alive
	};
	return self;
});
// Player Bullet
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bullet = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -32;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Player Ship
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var ship = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = ship.width;
	self.height = ship.height;
	self.shootCooldown = 0;
	self.poweredUp = false;
	self.powerupTimer = 0;
	self.shielded = false;
	self.shieldTimer = 0;
	self.rapidFire = false;
	self.rapidFireTimer = 0;
	self.update = function () {
		if (self.shootCooldown > 0) self.shootCooldown--;
		if (self.poweredUp) {
			self.powerupTimer--;
			if (self.powerupTimer <= 0) {
				self.poweredUp = false;
				ship.tint = 0x33c1ff;
			}
		}
		if (self.shielded) {
			self.shieldTimer--;
			if (self.shieldTimer <= 0) {
				self.shielded = false;
				ship.tint = 0x33c1ff;
			}
		}
		if (self.rapidFire) {
			self.rapidFireTimer--;
			if (self.rapidFireTimer <= 0) {
				self.rapidFire = false;
				ship.tint = 0x33c1ff;
			}
		}
	};
	self.activatePowerup = function (type) {
		if (!type || type === 'triple') {
			self.poweredUp = true;
			self.powerupTimer = 360; // 6 seconds at 60fps
			ship.tint = 0x44ff44;
		} else if (type === 'shield') {
			self.shielded = true;
			self.shieldTimer = 420; // 7 seconds
			ship.tint = 0x33c1ff;
		} else if (type === 'rapid') {
			self.rapidFire = true;
			self.rapidFireTimer = 300; // 5 seconds
			ship.tint = 0xffe066;
		}
	};
	return self;
});
// Powerup
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	// Randomly choose a type: 'triple', 'shield', 'rapid'
	var types = ['triple', 'shield', 'rapid'];
	self.type = types[Math.floor(Math.random() * types.length)];
	var color = 0x44ff44;
	if (self.type === 'shield') color = 0x33c1ff;
	if (self.type === 'rapid') color = 0xffe066;
	var p = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: color
	});
	self.speedY = 10;
	self.update = function () {
		self.y += self.speedY;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181828
});

/**** 
* Game Code
****/ 
// Play music
// Player ship: pixelated box
// Enemy: pixelated box
// Player bullet: small yellow box
// Enemy bullet: small red box
// Powerup: green ellipse
// Sound effects
// Music
LK.playMusic('bgmusic', {
	fade: {
		start: 0,
		end: 1,
		duration: 1200
	}
});
// Score display
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Powerup display
var powerupTxt = new Text2('', {
	size: 70,
	fill: 0x44FF44
});
powerupTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(powerupTxt);
powerupTxt.y = 120;
// Game objects
var player = new PlayerShip();
game.addChild(player);
player.x = 2048 / 2;
player.y = 2732 - 180;
var playerBullets = [];
var enemies = [];
var enemyBullets = [];
var powerups = [];
var dragNode = null;
var lastPlayerHit = false;
var spawnTimer = 0;
var powerupSpawnTimer = 600; // 10 seconds
// Move handler for dragging player ship
function handleMove(x, y, obj) {
	if (dragNode) {
		// Clamp to game area
		var minX = player.width / 2 + 40;
		var maxX = 2048 - player.width / 2 - 40;
		dragNode.x = Math.max(minX, Math.min(maxX, x));
		// Y is fixed at bottom
	}
}
game.move = handleMove;
game.down = function (x, y, obj) {
	// Only allow drag if touch is near player
	if (Math.abs(x - player.x) < player.width && Math.abs(y - player.y) < player.height) {
		dragNode = player;
		handleMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Touch anywhere to shoot
game.tap = function (x, y, obj) {
	// Not used, as shooting is auto-fire
};
// Main update loop
game.update = function () {
	// Player update
	player.update();
	// Player auto-fire
	if (player.shootCooldown <= 0) {
		var bullet = new PlayerBullet();
		bullet.x = player.x;
		bullet.y = player.y - player.height / 2 - 20;
		playerBullets.push(bullet);
		game.addChild(bullet);
		if (player.rapidFire) {
			player.shootCooldown = player.poweredUp ? 2 : 4;
		} else {
			player.shootCooldown = player.poweredUp ? 6 : 16;
		}
		LK.getSound('shoot').play();
		if (player.poweredUp) {
			// Side bullets
			for (var i = -1; i <= 1; i += 2) {
				var sideBullet = new PlayerBullet();
				sideBullet.x = player.x + i * 50;
				sideBullet.y = player.y - player.height / 2 - 20;
				playerBullets.push(sideBullet);
				game.addChild(sideBullet);
			}
		}
	}
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var b = playerBullets[i];
		b.update();
		if (b.y < -60) {
			b.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var e = enemies[j];
			if (b.intersects(e)) {
				// Damage enemy
				var destroyed = e.takeDamage();
				LK.effects.flashObject(e, 0xffffff, 200);
				b.destroy();
				playerBullets.splice(i, 1);
				if (destroyed) {
					LK.setScore(LK.getScore() + 10);
					scoreTxt.setText(LK.getScore());
					LK.getSound('explosion').play();
					e.destroy();
					enemies.splice(j, 1);
				} else {
					LK.getSound('explosion').play();
				}
				break;
			}
		}
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var e = enemies[i];
		e.update();
		if (e.y > 2732 + 100) {
			e.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Enemy shooting
		if (e.shootCooldown <= 0) {
			var eb = new EnemyBullet();
			eb.x = e.x;
			eb.y = e.y + e.height / 2 + 10;
			enemyBullets.push(eb);
			game.addChild(eb);
			e.shootCooldown = 90 + Math.floor(Math.random() * 60);
			LK.getSound('enemyShoot').play();
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var eb = enemyBullets[i];
		eb.update();
		if (eb.y > 2732 + 60) {
			eb.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (eb.intersects(player)) {
			if (player.shielded) {
				eb.destroy();
				enemyBullets.splice(i, 1);
			} else if (!player.poweredUp) {
				if (!lastPlayerHit) {
					LK.effects.flashScreen(0xff0000, 800);
					LK.showGameOver();
					lastPlayerHit = true;
				}
			} else {
				eb.destroy();
				enemyBullets.splice(i, 1);
			}
		}
	}
	// Update powerups
	for (var i = powerups.length - 1; i >= 0; i--) {
		var p = powerups[i];
		p.update();
		if (p.y > 2732 + 80) {
			p.destroy();
			powerups.splice(i, 1);
			continue;
		}
		if (p.intersects(player)) {
			player.activatePowerup(p.type);
			LK.getSound('powerup').play();
			if (p.type === 'shield') {
				powerupTxt.setText('SHIELD!');
			} else if (p.type === 'rapid') {
				powerupTxt.setText('RAPID FIRE!');
			} else {
				powerupTxt.setText('TRIPLE SHOT!');
			}
			tween(powerupTxt, {
				alpha: 0
			}, {
				duration: 1200,
				easing: tween.linear,
				onFinish: function onFinish() {
					powerupTxt.setText('');
					powerupTxt.alpha = 1;
				}
			});
			p.destroy();
			powerups.splice(i, 1);
		}
	}
	// Enemy spawn
	spawnTimer--;
	if (spawnTimer <= 0) {
		var e = new EnemyShip();
		e.x = 200 + Math.random() * (2048 - 400);
		e.y = -100;
		enemies.push(e);
		game.addChild(e);
		spawnTimer = Math.max(24, 90 - Math.floor(LK.getScore() / 100)); // Faster spawns as score increases
	}
	// Powerup spawn
	powerupSpawnTimer--;
	if (powerupSpawnTimer <= 0) {
		var p = new Powerup();
		p.x = 200 + Math.random() * (2048 - 400);
		p.y = -80;
		powerups.push(p);
		game.addChild(p);
		powerupSpawnTimer = 900 + Math.floor(Math.random() * 600); // 15-25 seconds
	}
	// Win condition: score 1000
	if (LK.getScore() >= 1000) {
		LK.showYouWin();
	}
	// Always reset lastPlayerHit at end of update (game will be reset by LK on game over)
	lastPlayerHit = false;
};
// Initial score
LK.setScore(0);
scoreTxt.setText('0');

===================================================================
--- original.js
+++ change.js
@@ -30,8 +30,10 @@
 	self.height = enemy.height;
 	self.speedY = 6 + Math.random() * 4;
 	self.speedX = (Math.random() - 0.5) * 6;
 	self.shootCooldown = 60 + Math.floor(Math.random() * 60);
+	// Add health property for 2 hearts
+	self.health = 2;
 	self.update = function () {
 		self.y += self.speedY;
 		self.x += self.speedX;
 		if (self.x < self.width / 2) {
@@ -45,8 +47,16 @@
 		if (self.shootCooldown > 0) {
 			self.shootCooldown--;
 		}
 	};
+	// Method to take damage
+	self.takeDamage = function () {
+		self.health--;
+		if (self.health <= 0) {
+			return true; // destroyed
+		}
+		return false; // still alive
+	};
 	return self;
 });
 // Player Bullet
 var PlayerBullet = Container.expand(function () {
@@ -257,16 +267,22 @@
 		// Check collision with enemies
 		for (var j = enemies.length - 1; j >= 0; j--) {
 			var e = enemies[j];
 			if (b.intersects(e)) {
-				LK.setScore(LK.getScore() + 10);
-				scoreTxt.setText(LK.getScore());
-				LK.getSound('explosion').play();
+				// Damage enemy
+				var destroyed = e.takeDamage();
 				LK.effects.flashObject(e, 0xffffff, 200);
-				e.destroy();
-				enemies.splice(j, 1);
 				b.destroy();
 				playerBullets.splice(i, 1);
+				if (destroyed) {
+					LK.setScore(LK.getScore() + 10);
+					scoreTxt.setText(LK.getScore());
+					LK.getSound('explosion').play();
+					e.destroy();
+					enemies.splice(j, 1);
+				} else {
+					LK.getSound('explosion').play();
+				}
 				break;
 			}
 		}
 	}