/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1", {
	highScore: 0,
	level: 1
});

/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = enemyGraphics.width;
	self.height = enemyGraphics.height;
	self.hp = 1;
	self.scoreValue = 100;
	self.canShoot = true;
	self.movingRight = true;
	self.moveSpeed = 2;
	self.dropDistance = 40;
	self.shoot = function () {
		if (!self.canShoot || Math.random() > 0.01) {
			return;
		} // Random chance to shoot
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y + self.height / 2;
		game.addChild(bullet);
		enemyBullets.push(bullet);
		// Cooldown between shots
		self.canShoot = false;
		LK.setTimeout(function () {
			self.canShoot = true;
		}, 2000);
	};
	self.takeDamage = function () {
		self.hp--;
		if (self.hp <= 0) {
			// Update score
			LK.setScore(LK.getScore() + self.scoreValue);
			scoreTxt.setText(LK.getScore());
			// Chance to drop power-up
			if (Math.random() < 0.1) {
				// 10% chance
				var powerUp = new PowerUp();
				powerUp.x = self.x;
				powerUp.y = self.y;
				game.addChild(powerUp);
				powerUps.push(powerUp);
			}
			// Play sound
			LK.getSound('enemyDestroyed').play();
			// Visual effect
			LK.effects.flashObject(self, 0xffff00, 300);
			// Remove enemy
			self.destroy();
			var index = enemies.indexOf(self);
			if (index > -1) {
				enemies.splice(index, 1);
			}
			// Check if level complete
			if (enemies.length === 0) {
				levelComplete();
			}
		} else {
			// Visual effect for damage
			LK.effects.flashObject(self, 0xffff00, 200);
		}
	};
	return self;
});
var Boss = Enemy.expand(function () {
	var self = Enemy.call(this);
	// Replace graphics with boss graphics
	self.removeChildAt(0);
	var bossGraphics = self.attachAsset('boss', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = bossGraphics.width;
	self.height = bossGraphics.height;
	self.hp = 20;
	self.scoreValue = 2000;
	self.moveSpeed = 3;
	self.attackPattern = 0;
	self.attackTimer = null;
	self.startAttackPattern = function () {
		self.attackTimer = LK.setInterval(function () {
			self.performAttack();
		}, 2000);
	};
	self.performAttack = function () {
		self.attackPattern = (self.attackPattern + 1) % 3;
		switch (self.attackPattern) {
			case 0:
				// Single strong shot
				var bullet = new EnemyBullet();
				bullet.x = self.x;
				bullet.y = self.y + self.height / 2;
				bullet.speed = 8;
				bullet.scale.set(2, 2);
				game.addChild(bullet);
				enemyBullets.push(bullet);
				break;
			case 1:
				// Multiple shots in a spread
				for (var i = -2; i <= 2; i++) {
					var bullet = new EnemyBullet();
					bullet.x = self.x + i * 40;
					bullet.y = self.y + self.height / 2;
					game.addChild(bullet);
					enemyBullets.push(bullet);
				}
				break;
			case 2:
				// Wave pattern of bullets
				var interval = LK.setInterval(function () {
					var bullet = new EnemyBullet();
					bullet.x = self.x + (Math.random() * 200 - 100);
					bullet.y = self.y + self.height / 2;
					game.addChild(bullet);
					enemyBullets.push(bullet);
				}, 200);
				LK.setTimeout(function () {
					LK.clearInterval(interval);
				}, 1000);
				break;
		}
	};
	var parentTakeDamage = self.takeDamage;
	self.takeDamage = function () {
		parentTakeDamage.call(self);
		// When boss is destroyed, clear the attack timer
		if (self.hp <= 0 && self.attackTimer) {
			LK.clearInterval(self.attackTimer);
		}
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.update = function () {
		self.y += self.speed;
		// Destroy if out of bounds
		if (self.y > 2732 + 50) {
			self.destroy();
			var index = enemyBullets.indexOf(self);
			if (index > -1) {
				enemyBullets.splice(index, 1);
			}
		}
	};
	return self;
});
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -15; // Negative because moving upward
	self.update = function () {
		self.y += self.speed;
		// Destroy if out of bounds
		if (self.y < -50) {
			self.destroy();
			var index = bullets.indexOf(self);
			if (index > -1) {
				bullets.splice(index, 1);
			}
		}
	};
	return self;
});
var PlayerShip = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('playerShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = shipGraphics.width;
	self.height = shipGraphics.height;
	self.lives = 3;
	self.speed = 15;
	self.canShoot = true;
	self.shootCooldown = 300; // milliseconds
	self.invulnerable = false;
	self.powerUpActive = false;
	self.startShootCooldown = function () {
		self.canShoot = false;
		LK.setTimeout(function () {
			self.canShoot = true;
		}, self.shootCooldown);
	};
	self.shoot = function () {
		if (!self.canShoot) {
			return;
		}
		var bullet = new PlayerBullet();
		bullet.x = self.x;
		bullet.y = self.y - self.height / 2;
		game.addChild(bullet);
		bullets.push(bullet);
		LK.getSound('shoot').play();
		self.startShootCooldown();
		// Create double bullet when power-up is active
		if (self.powerUpActive) {
			var bulletLeft = new PlayerBullet();
			bulletLeft.x = self.x - 20;
			bulletLeft.y = self.y - self.height / 2;
			var bulletRight = new PlayerBullet();
			bulletRight.x = self.x + 20;
			bulletRight.y = self.y - self.height / 2;
			game.addChild(bulletLeft);
			game.addChild(bulletRight);
			bullets.push(bulletLeft);
			bullets.push(bulletRight);
		}
	};
	self.hit = function () {
		if (self.invulnerable) {
			return;
		}
		self.lives--;
		LK.getSound('playerHit').play();
		// Flash player ship to indicate damage
		LK.effects.flashObject(self, 0xff0000, 1000);
		// Make player temporarily invulnerable
		self.invulnerable = true;
		LK.setTimeout(function () {
			self.invulnerable = false;
		}, 2000);
		// Check for game over
		if (self.lives <= 0) {
			LK.showGameOver();
		}
	};
	self.activatePowerUp = function (type) {
		LK.getSound('powerUpCollected').play();
		switch (type) {
			case 'rapidFire':
				var oldCooldown = self.shootCooldown;
				self.shootCooldown = 150;
				LK.setTimeout(function () {
					self.shootCooldown = oldCooldown;
				}, 5000);
				break;
			case 'doubleBullet':
				self.powerUpActive = true;
				LK.setTimeout(function () {
					self.powerUpActive = false;
				}, 8000);
				break;
			case 'shield':
				// Create shield
				createShield();
				break;
		}
	};
	self.update = function () {
		// Movement logic handled in game.update
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('powerUp', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3;
	self.type = ['rapidFire', 'doubleBullet', 'shield'][Math.floor(Math.random() * 3)];
	// Set color based on power-up type
	switch (self.type) {
		case 'rapidFire':
			powerUpGraphics.tint = 0xff0000; // Red
			break;
		case 'doubleBullet':
			powerUpGraphics.tint = 0x00ff00; // Green
			break;
		case 'shield':
			powerUpGraphics.tint = 0x0000ff; // Blue
			break;
	}
	self.update = function () {
		self.y += self.speed;
		// Destroy if out of bounds
		if (self.y > 2732 + 50) {
			self.destroy();
			var index = powerUps.indexOf(self);
			if (index > -1) {
				powerUps.splice(index, 1);
			}
		}
	};
	return self;
});
var Shield = Container.expand(function () {
	var self = Container.call(this);
	var shieldGraphics = self.attachAsset('shield', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.hp = 3;
	self.takeDamage = function () {
		self.hp--;
		// Visual feedback
		LK.effects.flashObject(self, 0x2980b9, 200);
		// Adjust opacity based on remaining HP
		self.alpha = self.hp / 3;
		if (self.hp <= 0) {
			self.destroy();
			var index = shields.indexOf(self);
			if (index > -1) {
				shields.splice(index, 1);
			}
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game constants
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
var GAME_MARGIN = 100;
var ENEMY_ROWS = 5;
var ENEMY_COLUMNS = 8;
var ENEMY_SPACING_X = 150;
var ENEMY_SPACING_Y = 120;
var ENEMY_START_Y = 300;
var GROUP_MOVE_AMOUNT = 15;
var GROUP_DROP_AMOUNT = 40;
var MOVE_INTERVAL = 800; // ms
// Game variables
var level = storage.level || 1;
var player;
var bullets = [];
var enemies = [];
var enemyBullets = [];
var shields = [];
var powerUps = [];
var enemyMoveTimer;
var movingRight = true;
var bossActive = false;
var touchX = null;
// Create UI elements
var scoreTxt = new Text2('0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
LK.gui.topRight.addChild(scoreTxt);
scoreTxt.x = -250; // Offset from the right edge
var levelTxt = new Text2('LEVEL ' + level, {
	size: 60,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(levelTxt);
var livesTxt = new Text2('LIVES: 3', {
	size: 60,
	fill: 0xFFFFFF
});
livesTxt.anchor.set(0, 0);
LK.gui.topLeft.addChild(livesTxt);
livesTxt.x = 120; // Ensure we don't place this in the top-left 100x100 area
// Game functions
function initializeGame() {
	// Reset game state
	clearArrays();
	// Set difficulty based on level
	var enemyHp = Math.min(Math.floor(level / 3) + 1, 3);
	var enemySpeed = Math.min(2 + level * 0.5, 8);
	var moveInterval = Math.max(MOVE_INTERVAL - level * 50, 300);
	// Add space background
	var spaceBackground = LK.getAsset('spaceBackground', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	spaceBackground.x = GAME_WIDTH / 2;
	spaceBackground.y = GAME_HEIGHT / 2;
	game.addChild(spaceBackground);
	// Create player
	player = new PlayerShip();
	player.x = GAME_WIDTH / 2;
	player.y = GAME_HEIGHT - 200;
	game.addChild(player);
	// Create enemies
	createEnemies(enemyHp);
	// Start enemy movement
	startEnemyMovement(moveInterval);
	// Reset score if starting a new game
	if (level === 1) {
		LK.setScore(0);
	}
	// Update UI
	scoreTxt.setText(LK.getScore());
	levelTxt.setText('LEVEL ' + level);
	// Play music
	LK.playMusic('gameMusic', {
		fade: {
			start: 0,
			end: 0.8,
			duration: 1000
		}
	});
}
function clearArrays() {
	// Clear existing game objects
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].destroy();
	}
	for (var i = enemies.length - 1; i >= 0; i--) {
		enemies[i].destroy();
	}
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		enemyBullets[i].destroy();
	}
	for (var i = shields.length - 1; i >= 0; i--) {
		shields[i].destroy();
	}
	for (var i = powerUps.length - 1; i >= 0; i--) {
		powerUps[i].destroy();
	}
	bullets = [];
	enemies = [];
	enemyBullets = [];
	shields = [];
	powerUps = [];
	// Clear any existing timers
	if (enemyMoveTimer) {
		LK.clearInterval(enemyMoveTimer);
	}
}
function createEnemies(hp) {
	bossActive = false;
	// Boss level every 5 levels
	if (level % 5 === 0) {
		createBoss();
		return;
	}
	// Create grid of enemies
	var startX = (GAME_WIDTH - (ENEMY_COLUMNS - 1) * ENEMY_SPACING_X) / 2;
	for (var row = 0; row < ENEMY_ROWS; row++) {
		for (var col = 0; col < ENEMY_COLUMNS; col++) {
			var enemy = new Enemy();
			// Different types/strength based on row
			if (row === 0) {
				enemy.hp = hp + 1;
				enemy.scoreValue = 300;
				enemy.tint = 0xff0000; // Red top row
			} else if (row === 1 || row === 2) {
				enemy.hp = hp;
				enemy.scoreValue = 200;
				enemy.tint = 0x00ff00; // Green middle rows
			} else {
				enemy.hp = Math.max(1, hp - 1);
				enemy.scoreValue = 100;
				enemy.tint = 0x0000ff; // Blue bottom rows
			}
			enemy.x = startX + col * ENEMY_SPACING_X;
			enemy.y = ENEMY_START_Y + row * ENEMY_SPACING_Y;
			game.addChild(enemy);
			enemies.push(enemy);
		}
	}
}
function createBoss() {
	bossActive = true;
	var boss = new Boss();
	boss.x = GAME_WIDTH / 2;
	boss.y = 300;
	boss.hp = 15 + level / 5 * 5; // Increases with level
	game.addChild(boss);
	enemies.push(boss);
	boss.startAttackPattern();
}
function startEnemyMovement(interval) {
	enemyMoveTimer = LK.setInterval(function () {
		moveEnemyGroup();
	}, interval);
}
function moveEnemyGroup() {
	if (enemies.length === 0) {
		return;
	}
	var reachedEdge = false;
	var moveAmount = bossActive ? GROUP_MOVE_AMOUNT * 1.5 : GROUP_MOVE_AMOUNT;
	// Check if any enemy would go beyond screen edge
	for (var i = 0; i < enemies.length; i++) {
		var enemy = enemies[i];
		if (movingRight && enemy.x + enemy.width / 2 + moveAmount > GAME_WIDTH - GAME_MARGIN || !movingRight && enemy.x - enemy.width / 2 - moveAmount < GAME_MARGIN) {
			reachedEdge = true;
			break;
		}
	}
	// Move group horizontally or drop and change direction
	if (reachedEdge) {
		movingRight = !movingRight;
		// Move all enemies down
		for (var i = 0; i < enemies.length; i++) {
			enemies[i].y += GROUP_DROP_AMOUNT;
		}
		// Check if enemies reached player's area
		checkEnemiesBottom();
	} else {
		// Move enemies sideways
		for (var i = 0; i < enemies.length; i++) {
			enemies[i].x += movingRight ? moveAmount : -moveAmount;
		}
	}
	// Try to make some enemies shoot
	for (var i = 0; i < enemies.length; i++) {
		enemies[i].shoot();
	}
}
function checkEnemiesBottom() {
	for (var i = 0; i < enemies.length; i++) {
		if (enemies[i].y + enemies[i].height / 2 > player.y - 100) {
			// Game over if enemies get too close to bottom
			LK.showGameOver();
			return;
		}
	}
}
function createShield() {
	var shield = new Shield();
	shield.x = player.x;
	shield.y = player.y - 80;
	game.addChild(shield);
	shields.push(shield);
}
function levelComplete() {
	LK.getSound('levelComplete').play();
	// Save high score if it's better than previous
	if (LK.getScore() > storage.highScore) {
		storage.highScore = LK.getScore();
	}
	// Increment level
	level++;
	storage.level = level;
	// Show level transition
	var levelCompleteTxt = new Text2('LEVEL COMPLETE!', {
		size: 120,
		fill: 0xFFFFFF
	});
	levelCompleteTxt.anchor.set(0.5, 0.5);
	levelCompleteTxt.x = GAME_WIDTH / 2;
	levelCompleteTxt.y = GAME_HEIGHT / 2;
	game.addChild(levelCompleteTxt);
	// Fade out current level
	tween(levelCompleteTxt, {
		alpha: 0
	}, {
		duration: 2000,
		onFinish: function onFinish() {
			levelCompleteTxt.destroy();
			// Start next level
			initializeGame();
		}
	});
}
function checkCollisions() {
	// Player bullets vs enemies
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		for (var j = enemies.length - 1; j >= 0; j--) {
			var enemy = enemies[j];
			if (bullet.intersects(enemy)) {
				// Handle hit
				enemy.takeDamage();
				// Remove bullet
				bullet.destroy();
				bullets.splice(i, 1);
				break;
			}
		}
	}
	// Enemy bullets vs player
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		// Check for shield hits first
		var hitShield = false;
		for (var j = shields.length - 1; j >= 0; j--) {
			var shield = shields[j];
			if (bullet.intersects(shield)) {
				shield.takeDamage();
				// Remove bullet
				bullet.destroy();
				enemyBullets.splice(i, 1);
				hitShield = true;
				break;
			}
		}
		if (hitShield) {
			continue;
		}
		// Check for player hit
		if (bullet.intersects(player)) {
			player.hit();
			// Remove bullet
			bullet.destroy();
			enemyBullets.splice(i, 1);
		}
	}
	// Player vs power-ups
	for (var i = powerUps.length - 1; i >= 0; i--) {
		var powerUp = powerUps[i];
		if (powerUp.intersects(player)) {
			player.activatePowerUp(powerUp.type);
			// Remove power-up
			powerUp.destroy();
			powerUps.splice(i, 1);
		}
	}
	// Update lives display
	livesTxt.setText('LIVES: ' + player.lives);
}
function movePlayer() {
	// If touch input is active, move towards it
	if (touchX !== null) {
		var moveSpeed = player.speed;
		var distanceToTouch = touchX - player.x;
		if (Math.abs(distanceToTouch) < moveSpeed) {
			player.x = touchX;
		} else if (distanceToTouch > 0) {
			player.x += moveSpeed;
		} else {
			player.x -= moveSpeed;
		}
	}
	// Keep player within screen bounds
	if (player.x < GAME_MARGIN + player.width / 2) {
		player.x = GAME_MARGIN + player.width / 2;
	} else if (player.x > GAME_WIDTH - GAME_MARGIN - player.width / 2) {
		player.x = GAME_WIDTH - GAME_MARGIN - player.width / 2;
	}
}
// Handle touch/mouse input
game.down = function (x, y, obj) {
	touchX = x;
	// Shoot when tapping
	player.shoot();
};
game.move = function (x, y, obj) {
	touchX = x;
};
game.up = function (x, y, obj) {
	touchX = null;
};
// Game update loop
game.update = function () {
	movePlayer();
	// Update all game objects
	for (var i = 0; i < bullets.length; i++) {
		bullets[i].update();
	}
	for (var i = 0; i < enemyBullets.length; i++) {
		enemyBullets[i].update();
	}
	for (var i = 0; i < powerUps.length; i++) {
		powerUps[i].update();
	}
	// Check for collisions
	checkCollisions();
};
// Initialize the game
initializeGame();

===================================================================
--- original.js
+++ change.js
@@ -392,8 +392,16 @@
 	// Set difficulty based on level
 	var enemyHp = Math.min(Math.floor(level / 3) + 1, 3);
 	var enemySpeed = Math.min(2 + level * 0.5, 8);
 	var moveInterval = Math.max(MOVE_INTERVAL - level * 50, 300);
+	// Add space background
+	var spaceBackground = LK.getAsset('spaceBackground', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	spaceBackground.x = GAME_WIDTH / 2;
+	spaceBackground.y = GAME_HEIGHT / 2;
+	game.addChild(spaceBackground);
 	// Create player
 	player = new PlayerShip();
 	player.x = GAME_WIDTH / 2;
 	player.y = GAME_HEIGHT - 200;