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

/**** 
* Classes
****/ 
var Boss = Container.expand(function () {
	var self = Container.call(this);
	// Boss graphics
	var bossGraphics = self.attachAsset('boss', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Boss properties
	self.speed = 2;
	self.health = 50;
	self.points = 500;
	self.lastX = 0;
	self.moveDirection = 1;
	self.movePhase = 0;
	self.active = false;
	self.turrets = [];
	self.attackPhase = 0;
	self.attackTimer = 0;
	// Add turrets
	for (var i = 0; i < 4; i++) {
		var turret = self.addChild(LK.getAsset('bossPart', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: i < 2 ? -100 : 100,
			y: i % 2 === 0 ? -50 : 50
		}));
		turret.health = 10;
		self.turrets.push(turret);
	}
	// Activate boss
	self.activate = function () {
		self.active = true;
		LK.getSound('bossAlert').play();
		// Entrance animation
		self.y = -150;
		tween.to(self, {
			y: 400
		}, 2000, tween.easing.easeOutQuad);
	};
	// Damage the boss
	self.damage = function (amount, target) {
		if (!self.active) {
			return false;
		}
		if (target) {
			// Hit a turret
			target.health -= amount;
			if (target.health <= 0) {
				// Create explosion
				var explosion = new Explosion();
				explosion.x = self.x + target.x;
				explosion.y = self.y + target.y;
				game.addChild(explosion);
				// Remove turret from array and destroy it
				var index = self.turrets.indexOf(target);
				if (index !== -1) {
					self.turrets.splice(index, 1);
				}
				target.destroy();
				// Add score
				LK.setScore(LK.getScore() + 50);
			} else {
				// Flash turret when hit
				LK.effects.flashObject(target, 0xffffff, 300);
			}
			return false;
		}
		// Hit the main boss body
		self.health -= amount;
		if (self.health <= 0) {
			// Create explosion
			var finalExplosion = new Explosion();
			finalExplosion.x = self.x;
			finalExplosion.y = self.y;
			game.addChild(finalExplosion);
			// Add score
			LK.setScore(LK.getScore() + self.points);
			// You win!
			LK.setTimeout(function () {
				LK.showYouWin();
			}, 1000);
			// Remove boss
			self.destroy();
			return true;
		}
		// Flash boss when hit
		LK.effects.flashObject(self, 0xffffff, 300);
		return false;
	};
	// Fire bullets from turrets
	self.fire = function () {
		if (!self.active || self.turrets.length === 0) {
			return;
		}
		// Fire from each turret
		for (var i = 0; i < self.turrets.length; i++) {
			var turret = self.turrets[i];
			var bullet = new EnemyBullet();
			bullet.x = self.x + turret.x;
			bullet.y = self.y + turret.y + 40;
			game.addChild(bullet);
			enemyBullets.push(bullet);
		}
		LK.getSound('enemyShoot').play();
	};
	// Update the boss
	self.update = function () {
		if (!self.active) {
			return;
		}
		self.lastX = self.x;
		// Move horizontally in a sine wave pattern
		self.movePhase += 0.02;
		self.x = 2048 / 2 + Math.sin(self.movePhase) * 500;
		// Attack patterns
		self.attackTimer++;
		if (self.attackTimer >= 60) {
			self.attackTimer = 0;
			// Different attack patterns based on phase
			if (self.attackPhase === 0) {
				self.fire();
			} else if (self.attackPhase === 1) {
				// Rapid fire
				self.fire();
				LK.setTimeout(function () {
					self.fire();
				}, 200);
				LK.setTimeout(function () {
					self.fire();
				}, 400);
			}
			// Change attack phase based on health
			self.attackPhase = self.health < 25 ? 1 : 0;
		}
	};
	return self;
});
// Set game background
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	// Enemy graphics
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Enemy properties
	self.speed = 3;
	self.fireRate = 120;
	self.health = 1;
	self.points = 10;
	self.lastY = 0;
	self.lastX = 0;
	self.moveDirection = 1;
	self.lastWasIntersecting = false;
	// Initialize with random horizontal movement
	self.horizontalSpeed = 1 + Math.random() * 2;
	if (Math.random() > 0.5) {
		self.horizontalSpeed *= -1;
	}
	// Damage the enemy
	self.damage = function (amount) {
		self.health -= amount;
		if (self.health <= 0) {
			// Create explosion
			var explosion = new Explosion();
			explosion.x = self.x;
			explosion.y = self.y;
			game.addChild(explosion);
			// Add score
			LK.setScore(LK.getScore() + self.points);
			// Remove enemy
			self.destroy();
			return true;
		}
		// Flash enemy when hit
		LK.effects.flashObject(self, 0xffffff, 300);
		return false;
	};
	// Fire a bullet
	self.fire = function () {
		if (Math.random() < 0.7 && player && player.health > 0) {
			var bullet = new EnemyBullet();
			bullet.x = self.x;
			bullet.y = self.y + 40;
			game.addChild(bullet);
			enemyBullets.push(bullet);
			LK.getSound('enemyShoot').play();
		}
	};
	// Update the enemy
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		// Move down
		self.y += self.speed;
		// Move side to side
		self.x += self.horizontalSpeed * self.moveDirection;
		// Bounce at edges
		if (self.x < 100 || self.x > 2048 - 100) {
			self.moveDirection *= -1;
		}
		// Occasionally fire
		if (LK.ticks % self.fireRate === 0) {
			self.fire();
		}
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	// Bullet graphics
	self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Bullet properties
	self.speed = 8;
	self.lastY = 0;
	self.lastWasIntersecting = false;
	// Update the bullet position
	self.update = function () {
		self.lastY = self.y;
		self.y += self.speed;
	};
	return self;
});
var Explosion = Container.expand(function () {
	var self = Container.call(this);
	// Explosion graphics
	var graphic = self.attachAsset('explosion', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.8
	});
	// Play explosion sound
	LK.getSound('explosion').play();
	// Animate the explosion
	tween(graphic, {
		scaleX: 2,
		scaleY: 2,
		alpha: 0
	}, {
		duration: 500,
		easing: tween.easeOutQuad,
		onFinish: function onFinish() {
			self.destroy();
		}
	});
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	// Bullet graphics
	self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Bullet properties
	self.speed = 15;
	self.damage = 1;
	self.lastY = 0;
	self.lastWasIntersecting = false;
	// Update the bullet position
	self.update = function () {
		self.lastY = self.y;
		self.y -= self.speed;
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	// Ship graphics
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Ship properties
	self.speed = 15;
	self.health = 3;
	self.shieldActive = false;
	self.lastX = 0;
	self.lastY = 0;
	self.fireRate = 15;
	self.lastFired = 0;
	self.invulnerable = false;
	// Shield
	self.shield = self.addChild(LK.getAsset('shield', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.5
	}));
	self.shield.visible = false;
	// Make ship fire a bullet
	self.fire = function () {
		if (LK.ticks - self.lastFired >= self.fireRate) {
			var bullet = new PlayerBullet();
			bullet.x = self.x;
			bullet.y = self.y - 50;
			game.addChild(bullet);
			bullets.push(bullet);
			LK.getSound('playerShoot').play();
			self.lastFired = LK.ticks;
		}
	};
	// Activate shield
	self.activateShield = function () {
		self.shieldActive = true;
		self.shield.visible = true;
		// Shield lasts for 5 seconds
		LK.setTimeout(function () {
			self.shieldActive = false;
			self.shield.visible = false;
		}, 5000);
	};
	// Damage the ship
	self.damage = function () {
		if (self.invulnerable) {
			return;
		}
		if (self.shieldActive) {
			self.shieldActive = false;
			self.shield.visible = false;
			return;
		}
		self.health--;
		if (self.health <= 0) {
			// Game over
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			return;
		}
		// Flash ship when hit
		LK.effects.flashObject(self, 0xff0000, 1000);
		// Make temporarily invulnerable
		self.invulnerable = true;
		shipGraphics.alpha = 0.5;
		LK.setTimeout(function () {
			self.invulnerable = false;
			shipGraphics.alpha = 1;
		}, 1500);
	};
	// Update method
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	// PowerUp types: 0 = shield, 1 = rapid fire
	self.type = Math.floor(Math.random() * 2);
	// PowerUp graphics (different colors based on type)
	var color = self.type === 0 ? 0x3498db : 0xf1c40f;
	var graphic = self.attachAsset('shield', {
		anchorX: 0.5,
		anchorY: 0.5,
		tint: color
	});
	// PowerUp properties
	self.speed = 2;
	self.lastY = 0;
	self.lastWasIntersecting = false;
	// Animate the powerup
	function _onFinish() {
		tween(graphic, {
			scaleX: 0.8,
			scaleY: 0.8
		}, {
			duration: 500,
			easing: tween.easeInOut,
			onFinish: function onFinish() {
				// Create repeating animation by reversing it
				tween(graphic, {
					scaleX: 1.2,
					scaleY: 1.2
				}, {
					duration: 500,
					easing: tween.easeInOut,
					onFinish: _onFinish
				});
			}
		});
	}
	tween(graphic, {
		scaleX: 1.2,
		scaleY: 1.2
	}, {
		duration: 500,
		easing: tween.easeInOut,
		onFinish: _onFinish
	});
	// Apply the powerup effect
	self.apply = function () {
		LK.getSound('powerup').play();
		if (self.type === 0) {
			// Shield powerup
			player.activateShield();
		} else {
			// Rapid fire powerup
			var oldFireRate = player.fireRate;
			player.fireRate = 5;
			LK.setTimeout(function () {
				player.fireRate = oldFireRate;
			}, 5000);
		}
	};
	// Update the powerup
	self.update = function () {
		self.lastY = self.y;
		self.y += self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Import the tween library for animations
// Background music
// Game sounds
// Define player ship, bullets, enemies, and other game assets
// Set game background
game.setBackgroundColor(0x000033);
// Initialize game variables
var player;
var bullets = [];
var enemies = [];
var enemyBullets = [];
var powerUps = [];
var boss;
var waveCount = 0;
var enemiesDefeated = 0;
var bossSpawned = false;
var gameOver = false;
var score = 0;
// Create score text
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(scoreTxt);
scoreTxt.x = 120; // Keep away from top left 100x100 area
// Create wave text
var waveTxt = new Text2('Wave: 1', {
	size: 60,
	fill: 0xFFFFFF
});
waveTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(waveTxt);
// Create health text
var healthTxt = new Text2('Health: 3', {
	size: 60,
	fill: 0xFFFFFF
});
healthTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(healthTxt);
// Initialize player
player = new PlayerShip();
player.x = 2048 / 2;
player.y = 2732 - 200;
game.addChild(player);
// Create boss (not active yet)
boss = new Boss();
boss.x = 2048 / 2;
game.addChild(boss);
// Create a new wave of enemies
function createWave() {
	waveCount++;
	waveTxt.setText('Wave: ' + waveCount);
	// Boss appears after wave 5
	if (waveCount >= 5 && !bossSpawned) {
		bossSpawned = true;
		boss.activate();
		return;
	}
	// Create a new wave of enemies
	var count = 5 + waveCount * 2;
	for (var i = 0; i < count; i++) {
		var enemy = new Enemy();
		enemy.x = 200 + Math.random() * (2048 - 400);
		enemy.y = -100 - Math.random() * 500;
		// Keep enemies at 1 health for one-hit defeats
		enemy.health = 1;
		enemy.points = 10 * waveCount;
		game.addChild(enemy);
		enemies.push(enemy);
	}
}
// Initial wave
createWave();
// Play background music
LK.playMusic('gameMusic', {
	loop: true
});
// Event handlers for player controls
var touchActive = false;
var touchX = 0;
// Mouse/touch down
game.down = function (x, y, obj) {
	touchActive = true;
	touchX = x;
	// Fire weapon
	if (player && player.health > 0) {
		player.fire();
	}
};
// Mouse/touch move
game.move = function (x, y, obj) {
	if (touchActive && player && player.health > 0) {
		// Move player
		var deltaX = x - touchX;
		player.x += deltaX;
		// Keep player within screen bounds
		player.x = Math.max(100, Math.min(2048 - 100, player.x));
		touchX = x;
	}
};
// Mouse/touch up
game.up = function (x, y, obj) {
	touchActive = false;
};
// Main game update loop
game.update = function () {
	if (gameOver) {
		return;
	}
	// Update player
	if (player) {
		player.update();
		// Auto-fire if touch is active
		if (touchActive && LK.ticks % 15 === 0) {
			player.fire();
		}
	}
	// Update boss
	if (boss) {
		boss.update();
	}
	// Update player bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		bullet.update();
		// Check if bullet is off screen
		if (bullet.y < -50) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		var hitEnemy = false;
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (!bullet.lastWasIntersecting && bullet.intersects(enemy)) {
				bullet.lastWasIntersecting = true;
				// Damage enemy
				if (enemy.damage(bullet.damage)) {
					enemies.splice(j, 1);
					enemiesDefeated++;
					// Spawn powerup (10% chance)
					if (Math.random() < 0.1) {
						var powerUp = new PowerUp();
						powerUp.x = enemy.x;
						powerUp.y = enemy.y;
						game.addChild(powerUp);
						powerUps.push(powerUp);
					}
				}
				// Remove bullet
				bullet.destroy();
				bullets.splice(i, 1);
				hitEnemy = true;
				break;
			}
		}
		// Skip boss check if already hit an enemy
		if (hitEnemy) {
			continue;
		}
		// Check collision with boss
		if (boss && boss.active) {
			// Check collision with turrets first
			var hitTurret = false;
			for (var t = 0; t < boss.turrets.length; t++) {
				var turret = boss.turrets[t];
				var turretGlobal = game.toLocal(boss.toGlobal({
					x: turret.x,
					y: turret.y
				}));
				if (Math.abs(bullet.x - turretGlobal.x) < 50 && Math.abs(bullet.y - turretGlobal.y) < 50) {
					boss.damage(bullet.damage, turret);
					bullet.destroy();
					bullets.splice(i, 1);
					hitTurret = true;
					break;
				}
			}
			if (hitTurret) {
				continue;
			}
			// Check collision with boss body
			if (!bullet.lastWasIntersecting && bullet.intersects(boss)) {
				bullet.lastWasIntersecting = true;
				// Damage boss
				boss.damage(bullet.damage);
				// Remove bullet
				bullet.destroy();
				bullets.splice(i, 1);
			}
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var enemyBullet = enemyBullets[i];
		enemyBullet.update();
		// Check if bullet is off screen
		if (enemyBullet.y > 2732 + 50) {
			enemyBullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (player && player.health > 0 && !enemyBullet.lastWasIntersecting && enemyBullet.intersects(player)) {
			enemyBullet.lastWasIntersecting = true;
			// Damage player
			player.damage();
			// Update health text
			healthTxt.setText('Health: ' + player.health);
			// Remove bullet
			enemyBullet.destroy();
			enemyBullets.splice(i, 1);
		}
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		enemy.update();
		// Check if enemy is off screen
		if (enemy.y > 2732 + 100) {
			enemy.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (player && player.health > 0 && !enemy.lastWasIntersecting && enemy.intersects(player)) {
			enemy.lastWasIntersecting = true;
			// Damage player
			player.damage();
			// Update health text
			healthTxt.setText('Health: ' + player.health);
			// Damage enemy
			if (enemy.damage(1)) {
				enemies.splice(i, 1);
				enemiesDefeated++;
			}
		}
	}
	// Update powerups
	for (var i = powerUps.length - 1; i >= 0; i--) {
		var powerUp = powerUps[i];
		powerUp.update();
		// Check if powerup is off screen
		if (powerUp.y > 2732 + 50) {
			powerUp.destroy();
			powerUps.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (player && player.health > 0 && !powerUp.lastWasIntersecting && powerUp.intersects(player)) {
			powerUp.lastWasIntersecting = true;
			// Apply powerup effect
			powerUp.apply();
			// Remove powerup
			powerUp.destroy();
			powerUps.splice(i, 1);
		}
	}
	// Check if wave is completed
	if (enemies.length === 0 && !bossSpawned) {
		createWave();
	}
	// Update score text
	scoreTxt.setText('Score: ' + LK.getScore());
};

===================================================================
--- original.js
+++ change.js
@@ -242,14 +242,18 @@
 	});
 	// Play explosion sound
 	LK.getSound('explosion').play();
 	// Animate the explosion
-	tween.to(graphic, {
+	tween(graphic, {
 		scaleX: 2,
 		scaleY: 2,
 		alpha: 0
-	}, 500, tween.easing.easeOutQuad, function () {
-		self.destroy();
+	}, {
+		duration: 500,
+		easing: tween.easeOutQuad,
+		onFinish: function onFinish() {
+			self.destroy();
+		}
 	});
 	return self;
 });
 var PlayerBullet = Container.expand(function () {
@@ -366,26 +370,35 @@
 	self.lastY = 0;
 	self.lastWasIntersecting = false;
 	// Animate the powerup
 	function _onFinish() {
-		var t1 = tween.create();
-		t1.to(graphic, {
+		tween(graphic, {
 			scaleX: 0.8,
 			scaleY: 0.8
-		}, 500, "easeInOutQuad", function onFinish() {
-			// Create repeating animation by reversing it
-			var t2 = tween.create();
-			t2.to(graphic, {
-				scaleX: 1.2,
-				scaleY: 1.2
-			}, 500, "easeInOutQuad", _onFinish);
+		}, {
+			duration: 500,
+			easing: tween.easeInOut,
+			onFinish: function onFinish() {
+				// Create repeating animation by reversing it
+				tween(graphic, {
+					scaleX: 1.2,
+					scaleY: 1.2
+				}, {
+					duration: 500,
+					easing: tween.easeInOut,
+					onFinish: _onFinish
+				});
+			}
 		});
 	}
-	var initialTween = tween.create();
-	initialTween.to(graphic, {
+	tween(graphic, {
 		scaleX: 1.2,
 		scaleY: 1.2
-	}, 500, "easeInOutQuad", _onFinish);
+	}, {
+		duration: 500,
+		easing: tween.easeInOut,
+		onFinish: _onFinish
+	});
 	// Apply the powerup effect
 	self.apply = function () {
 		LK.getSound('powerup').play();
 		if (self.type === 0) {