/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	highScore: 0
});

/**** 
* Classes
****/ 
var BossEnemy = Container.expand(function () {
	var self = Container.call(this);
	var bossGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 3,
		scaleY: 3
	});
	self.health = 30;
	self.speedY = 0.5;
	self.movePattern = 2; // Always use sine wave pattern
	self.patternOffset = Math.random() * 100;
	self.shootTimer = 60; // Shoot more frequently than regular enemies
	self.update = function () {
		// Move down slowly until reaching position
		if (self.y < 300) {
			self.y += self.speedY;
		}
		// Side-to-side movement
		self.x = self.startX + Math.sin(LK.ticks * 0.02 + self.patternOffset) * 200;
		// Shoot less frequently
		self.shootTimer--;
		if (self.shootTimer <= 0) {
			// Create enemy bullets (multiple)
			var bullet1 = new Bullet();
			bullet1.speed = 6;
			bullet1.x = self.x - 30;
			bullet1.y = self.y + 50;
			game.addChild(bullet1);
			enemyBullets.push(bullet1);
			var bullet2 = new Bullet();
			bullet2.speed = 6;
			bullet2.x = self.x + 30;
			bullet2.y = self.y + 50;
			game.addChild(bullet2);
			enemyBullets.push(bullet2);
			var bullet3 = new Bullet();
			bullet3.speed = 5;
			bullet3.x = self.x;
			bullet3.y = self.y + 50;
			game.addChild(bullet3);
			enemyBullets.push(bullet3);
			self.shootTimer = 180; // Increased from 60 to 180 to make boss shoot less frequently
		}
		return false;
	};
	return self;
});
var Bullet = 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;
		// Remove bullets that go off screen
		if (self.y < -50) {
			return true; // Return true to mark for removal
		}
		return false;
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedY = 1.5 + Math.random() * 1.5;
	self.movePattern = Math.floor(Math.random() * 3); // 0: straight, 1: zigzag, 2: sine
	self.patternOffset = Math.random() * 100;
	self.shootTimer = 180 + Math.floor(Math.random() * 240);
	self.update = function () {
		self.y += self.speedY;
		// Different movement patterns
		switch (self.movePattern) {
			case 1:
				// Zigzag
				self.x += Math.sin(LK.ticks * 0.05 + self.patternOffset) * 3;
				break;
			case 2:
				// Sine wave
				self.x = self.startX + Math.sin(LK.ticks * 0.03 + self.patternOffset) * 150;
				break;
		}
		// Shoot occasionally
		self.shootTimer--;
		if (self.shootTimer <= 0) {
			// Create enemy bullet
			var bullet = new Bullet();
			bullet.speed = 5; // Bullets move down
			bullet.x = self.x;
			bullet.y = self.y + 30;
			game.addChild(bullet);
			enemyBullets.push(bullet);
			self.shootTimer = 180 + Math.floor(Math.random() * 240);
		}
		// Remove if off bottom of screen
		if (self.y > 2732 + 100) {
			return true; // Mark for removal
		}
		return false;
	};
	return self;
});
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var spaceshipGraphics = self.attachAsset('spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.shootCooldown = 0;
	self.shootDelay = 15;
	self.speed = 5;
	self.lives = 3;
	self.shoot = function () {
		if (self.shootCooldown <= 0) {
			self.shootCooldown = self.shootDelay;
			// Create a single bullet
			var bullet = new Bullet();
			bullet.x = self.x;
			bullet.y = self.y;
			game.addChild(bullet);
			bullets.push(bullet);
			// Play shoot sound
			LK.getSound('shoot').play();
			return true;
		}
		return false;
	};
	self.update = function () {
		// Update cooldown
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game state
var gameRunning = true;
var level = 1;
var score = 0;
var lives = 3;
var enemySpawnRate = 150; // Reduced from 300 to spawn enemies more frequently
var enemySpawnCountdown = 150;
var bossActive = false;
var bossHealth = 30;
var boss = null;
// Game elements
var spaceship;
var bullets = [];
var enemyBullets = [];
var enemies = [];
// Create UI elements
var scoreTxt = new Text2('Score: 0', {
	size: 50,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
LK.gui.topRight.addChild(scoreTxt);
scoreTxt.x = -250; // Offset from right edge
var levelTxt = new Text2('Level: 1', {
	size: 50,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
levelTxt.y = 10;
var livesTxt = new Text2('Lives: 3', {
	size: 50,
	fill: 0xFFFFFF
});
livesTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(livesTxt);
livesTxt.x = 120; // Offset to avoid menu button
livesTxt.y = 10;
var highScoreTxt = new Text2('High Score: ' + storage.highScore, {
	size: 40,
	fill: 0xFFFFFF
});
highScoreTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(highScoreTxt);
highScoreTxt.y = 60;
// Drag handling
var isDragging = false;
// Initialize game elements
function initializeGame() {
	// Create player spaceship
	spaceship = new Spaceship();
	spaceship.x = 2048 / 2;
	spaceship.y = 2732 - 200;
	game.addChild(spaceship);
	// Reset variables
	bullets = [];
	enemyBullets = [];
	enemies = [];
	level = 1;
	score = 0;
	lives = 3;
	// Update UI
	updateUI();
	// Start game music
	LK.playMusic('gameMusic');
}
// Update UI elements
function updateUI() {
	scoreTxt.setText('Score: ' + score);
	levelTxt.setText('Level: ' + level);
	livesTxt.setText('Lives: ' + lives);
	highScoreTxt.setText('High Score: ' + storage.highScore);
	// Update score in LK system
	LK.setScore(score);
}
// Create explosion effect
function createExplosion(x, y, color) {
	// Flash object
	var explosionObj = new Container();
	explosionObj.x = x;
	explosionObj.y = y;
	var explosionGraphic = explosionObj.attachAsset('asteroid', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.7
	});
	game.addChild(explosionObj);
	// Animate explosion
	tween(explosionGraphic, {
		scaleX: 2,
		scaleY: 2,
		alpha: 0
	}, {
		duration: 500,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			explosionObj.destroy();
		}
	});
	// Play explosion sound
	LK.getSound('explosion').play();
}
// Handle collisions
function checkCollisions() {
	// Player bullets with enemies
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Check collision with boss if active
		if (bossActive && boss && bullet.intersects(boss)) {
			// Create small explosion effect
			createExplosion(bullet.x, bullet.y, 0xe74c3c);
			// Remove bullet
			bullet.destroy();
			bullets.splice(i, 1);
			// Reduce boss health
			bossHealth--;
			updateBossHealthBar();
			// Check if boss is defeated
			if (bossHealth <= 0) {
				// Create large explosion
				createExplosion(boss.x, boss.y, 0xe74c3c);
				createExplosion(boss.x - 50, boss.y + 30, 0xe74c3c);
				createExplosion(boss.x + 50, boss.y - 30, 0xe74c3c);
				// Remove boss
				boss.destroy();
				boss = null;
				bossActive = false;
				// Award big score
				score += 200;
				updateUI();
			}
			continue; // Skip checking other enemies
		}
		// Check collision with regular enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				// Create explosion
				createExplosion(enemy.x, enemy.y, 0xe74c3c);
				// Remove enemy and bullet
				enemy.destroy();
				enemies.splice(j, 1);
				bullet.destroy();
				bullets.splice(i, 1);
				// Increase score
				score += 15;
				updateUI();
				break; // Bullet can only hit one enemy
			}
		}
	}
	// Check player collisions with enemy ships
	for (var i = enemies.length - 1; i >= 0; i--) {
		if (spaceship.intersects(enemies[i])) {
			// Create explosion
			createExplosion(enemies[i].x, enemies[i].y, 0xe74c3c);
			// Remove enemy
			enemies[i].destroy();
			enemies.splice(i, 1);
			// Player loses a life
			lives--;
			updateUI();
			if (lives <= 0) {
				gameOver();
			}
		}
	}
	// Check player collisions with enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		if (spaceship.intersects(enemyBullets[i])) {
			// Create small explosion
			createExplosion(enemyBullets[i].x, enemyBullets[i].y, 0xffffff);
			// Remove bullet
			enemyBullets[i].destroy();
			enemyBullets.splice(i, 1);
			// Player loses a life
			lives--;
			updateUI();
			if (lives <= 0) {
				gameOver();
			}
		}
	}
}
// Check if game level should increase
function checkLevelProgression() {
	if (score >= level * 100) {
		level++;
		updateUI();
		// Increase difficulty - make spawn rate lower but not as aggressively
		enemySpawnRate = Math.max(90, enemySpawnRate - 10);
		// Spawn boss at level 5 and above
		if (level >= 5 && !bossActive) {
			spawnBoss();
		}
		// Show level up text
		var levelUpTxt = new Text2('Level ' + level + '!', {
			size: 100,
			fill: 0xFFFF00
		});
		levelUpTxt.anchor.set(0.5, 0.5);
		levelUpTxt.x = 2048 / 2;
		levelUpTxt.y = 2732 / 2;
		game.addChild(levelUpTxt);
		// Animate and remove
		tween(levelUpTxt, {
			alpha: 0,
			scaleX: 2,
			scaleY: 2
		}, {
			duration: 1500,
			onFinish: function onFinish() {
				levelUpTxt.destroy();
			}
		});
	}
}
// Spawn boss function
function spawnBoss() {
	bossActive = true;
	bossHealth = 30;
	// Create boss warning text
	var warningText = new Text2('BOSS INCOMING!', {
		size: 120,
		fill: 0xFF0000
	});
	warningText.anchor.set(0.5, 0.5);
	warningText.x = 2048 / 2;
	warningText.y = 2732 / 2;
	game.addChild(warningText);
	// Animate and remove warning
	tween(warningText, {
		alpha: 0,
		scaleX: 2,
		scaleY: 2
	}, {
		duration: 1500,
		onFinish: function onFinish() {
			warningText.destroy();
			// Create and add boss
			boss = new BossEnemy();
			boss.x = 2048 / 2;
			boss.y = -150;
			boss.startX = boss.x;
			game.addChild(boss);
			// Create boss health bar
			updateBossHealthBar();
		}
	});
}
// Update boss health bar
function updateBossHealthBar() {
	// Remove old health bar if exists
	if (game.bossHealthBar) {
		game.bossHealthBar.destroy();
	}
	// Create new health bar
	var healthBar = new Container();
	healthBar.x = 2048 / 2 - 300;
	healthBar.y = 100;
	// Background
	var barBg = healthBar.attachAsset('asteroid', {
		anchorX: 0,
		anchorY: 0.5,
		scaleX: 6,
		scaleY: 0.5
	});
	barBg.tint = 0x333333;
	// Health fill
	var barFill = healthBar.attachAsset('asteroid', {
		anchorX: 0,
		anchorY: 0.5,
		scaleX: bossHealth / 30 * 6,
		scaleY: 0.4
	});
	barFill.tint = 0xFF0000;
	// Add health text
	var healthText = new Text2('Boss: ' + bossHealth + '/30', {
		size: 40,
		fill: 0xFFFFFF
	});
	healthText.anchor.set(0.5, 0.5);
	healthText.x = 300;
	healthText.y = 0;
	healthBar.addChild(healthText);
	game.addChild(healthBar);
	game.bossHealthBar = healthBar;
}
// Game over function
function gameOver() {
	gameRunning = false;
	// Update high score
	if (score > storage.highScore) {
		storage.highScore = score;
		updateUI();
	}
	// Show game over screen
	LK.showGameOver();
}
// Initialize the game
initializeGame();
// Touch and mouse controls
game.down = function (x, y, obj) {
	isDragging = true;
	// Fire a bullet when tapping
	if (gameRunning) {
		spaceship.shoot();
	}
	// Move spaceship to touch position
	spaceship.x = x;
	spaceship.y = y;
};
game.up = function (x, y, obj) {
	isDragging = false;
};
game.move = function (x, y, obj) {
	if (isDragging && gameRunning) {
		// Move spaceship to touch position
		spaceship.x = x;
		// Limit Y position to bottom area
		spaceship.y = Math.min(y, 2732 - 150);
		spaceship.y = Math.max(spaceship.y, 2732 / 2);
	}
};
// Game update function
game.update = function () {
	if (!gameRunning) return;
	// Update spaceship
	spaceship.update();
	// Auto-fire when holding
	if (isDragging && LK.ticks % 15 === 0) {
		spaceship.shoot();
	}
	// Update boss if active
	if (bossActive && boss) {
		boss.update();
	}
	// Only spawn regular enemies if boss is not active
	else {
		// Spawn enemies
		enemySpawnCountdown--;
		if (enemySpawnCountdown <= 0) {
			var enemy = new Enemy();
			enemy.x = Math.random() * 2048;
			enemy.y = -100;
			enemy.startX = enemy.x; // Save starting X for sine movement
			game.addChild(enemy);
			enemies.push(enemy);
			enemySpawnCountdown = enemySpawnRate;
		}
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		if (bullets[i].update()) {
			bullets[i].destroy();
			bullets.splice(i, 1);
		}
	}
	// Update enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		if (enemyBullets[i].update()) {
			enemyBullets[i].destroy();
			enemyBullets.splice(i, 1);
		}
	}
	// Update enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		if (enemies[i].update()) {
			enemies[i].destroy();
			enemies.splice(i, 1);
		}
	}
	// Check collisions
	checkCollisions();
	// Check level progression
	checkLevelProgression();
};

===================================================================
--- original.js
+++ change.js
@@ -351,10 +351,10 @@
 		level++;
 		updateUI();
 		// Increase difficulty - make spawn rate lower but not as aggressively
 		enemySpawnRate = Math.max(90, enemySpawnRate - 10);
-		// Spawn boss at level 2 and above (after level 1)
-		if (level > 1 && !bossActive) {
+		// Spawn boss at level 5 and above
+		if (level >= 5 && !bossActive) {
 			spawnBoss();
 		}
 		// Show level up text
 		var levelUpTxt = new Text2('Level ' + level + '!', {