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

/**** 
* Classes
****/ 
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.canShoot = true;
	self.lastBulletY = 0;
	self.lastY = 0;
	self.currentBulletId = -1;
	self.shootInterval = 240;
	self.shootTimer = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.velocityX = 0;
	self.velocityY = 20;
	self.update = function () {
		self.y += self.velocityY;
		self.x += self.velocityX;
	};
	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;
	self.velocityX = 0;
	self.update = function () {
		self.y += self.speed;
		self.x += self.velocityX;
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	self.type = 'life';
	self.speed = 3;
	self.lastY = 0;
	var powerUpGraphics = self.attachAsset('powerUpLife', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.y += self.speed;
	};
	self.setType = function (type) {
		self.type = type;
		if (self.children && self.children.length > 0) {
			self.removeChildAt(0);
		}
		var assetId = 'powerUpLife';
		if (type === 'shield') {
			assetId = 'powerUpShield';
		} else if (type === 'tripleshot') {
			assetId = 'powerUpTripleShot';
		}
		var newGraphics = self.attachAsset(assetId, {
			anchorX: 0.5,
			anchorY: 0.5
		});
		self.type = type;
	};
	return self;
});
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var shipGraphics = self.attachAsset('spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.shieldActive = false;
	self.shieldTime = 0;
	self.tripleShot = false;
	self.tripleShotTime = 0;
	self.tripleShotUnlimited = false;
	self.invulnerable = false;
	self.invulnerabilityTime = 0;
	self.update = function () {
		if (self.invulnerable) {
			self.invulnerabilityTime--;
			if (self.invulnerabilityTime <= 0) {
				self.invulnerable = false;
				shipGraphics.tint = 0xffffff;
			}
		}
		if (self.shieldActive) {
			self.shieldTime--;
			if (self.shieldTime <= 0) {
				self.shieldActive = false;
				shipGraphics.tint = 0xffffff;
			}
		}
		if (self.tripleShot && !self.tripleShotUnlimited) {
			self.tripleShotTime--;
			if (self.tripleShotTime <= 0) {
				self.tripleShot = false;
			}
		}
	};
	self.activateShield = function (duration) {
		self.shieldActive = true;
		self.shieldTime = duration;
		shipGraphics.tint = 0x0099ff;
	};
	self.activateTripleShot = function (duration) {
		self.tripleShot = true;
		self.tripleShotTime = 999999;
		self.tripleShotUnlimited = true;
	};
	self.activateInvulnerability = function (duration) {
		self.invulnerable = true;
		self.invulnerabilityTime = duration;
		shipGraphics.tint = 0x00ff00;
	};
	return self;
});
var TargetingEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	enemyGraphics.tint = 0xff6600;
	self.speed = 2;
	self.canShoot = true;
	self.lastBulletY = 0;
	self.lastY = 0;
	self.health = 2;
	self.currentBulletId = -1;
	self.shootInterval = 320;
	self.shootTimer = 0;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var TripleShotEnemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.canShoot = true;
	self.lastBulletY = 0;
	self.lastY = 0;
	self.health = 3;
	self.currentBulletIds = [-1, -1, -1];
	self.zigzagOffset = 0;
	self.zigzagDirection = 1;
	self.shootInterval = 360;
	self.shootTimer = 0;
	self.update = function () {
		self.y += self.speed;
		self.zigzagOffset += self.zigzagDirection * 1.5;
		if (Math.abs(self.zigzagOffset) > 80) {
			self.zigzagDirection *= -1;
		}
		self.x += self.zigzagDirection * 0.8;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000033
});

/**** 
* Game Code
****/ 
var spaceship = game.addChild(new Spaceship());
spaceship.x = 1024;
spaceship.y = 2500;
var playerBullets = [];
var enemies = [];
var enemyBullets = [];
var powerUps = [];
var lives = 3;
var currentPhase = 1;
var enemiesDefeated = 0;
var totalEnemiesInPhase = 20 + (currentPhase - 1) * 10;
var shootTimer = 0;
var shootInterval = 20;
var spawnTimer = 0;
var spawnInterval = 40;
var gameOver = false;
var activeTripleShotEnemies = 0;
var activeTargetingEnemies = 0;
var livesText = new Text2('Lives: 3', {
	size: 80,
	fill: 0xFFFFFF
});
livesText.anchor.set(0, 0);
LK.gui.topLeft.addChild(livesText);
var phaseText = new Text2('Phase 1', {
	size: 80,
	fill: 0xFFFFFF
});
phaseText.anchor.set(0.5, 0);
LK.gui.top.addChild(phaseText);
var enemyCountText = new Text2('Enemies: 20', {
	size: 80,
	fill: 0xFFFFFF
});
enemyCountText.anchor.set(1, 0);
LK.gui.topRight.addChild(enemyCountText);
var positionText = new Text2('X: 0 Y: 0', {
	size: 60,
	fill: 0xFFFFFF
});
positionText.anchor.set(1, 1);
LK.gui.bottomRight.addChild(positionText);
function updateUI() {
	livesText.setText('Lives: ' + lives);
	phaseText.setText('Phase ' + currentPhase);
	enemyCountText.setText('Enemies: ' + (totalEnemiesInPhase - enemiesDefeated));
	positionText.setText('X: ' + Math.round(spaceship.x) + ' Y: ' + Math.round(spaceship.y));
}
function spawnEnemy() {
	var enemyType = Math.random();
	var enemy;
	if (enemyType < 0.7) {
		enemy = game.addChild(new Enemy());
	} else if (enemyType < 0.85 && activeTripleShotEnemies < 2) {
		enemy = game.addChild(new TripleShotEnemy());
		activeTripleShotEnemies++;
	} else if (activeTargetingEnemies < 2) {
		enemy = game.addChild(new TargetingEnemy());
		activeTargetingEnemies++;
	} else {
		enemy = game.addChild(new Enemy());
	}
	var spawnPositions = [164, 410, 656, 902, 1148, 1394, 1640, 1886];
	var randomIndex = Math.floor(Math.random() * spawnPositions.length);
	enemy.x = spawnPositions[randomIndex];
	var usedYPositions = [];
	for (var k = 0; k < enemies.length; k++) {
		usedYPositions.push(enemies[k].y);
	}
	var spawnY = -60;
	var validSpawn = false;
	var attempts = 0;
	var minDistance = 200;
	while (!validSpawn && attempts < 20) {
		spawnY = -60 - Math.floor(Math.random() * 10) * 80;
		var isUsed = false;
		for (var m = 0; m < usedYPositions.length; m++) {
			if (Math.abs(spawnY - usedYPositions[m]) < minDistance) {
				isUsed = true;
				break;
			}
		}
		if (!isUsed) {
			validSpawn = true;
		}
		attempts++;
	}
	enemy.y = spawnY;
	enemy.speed = 3 + (currentPhase - 1) * 0.45;
	enemy.lastY = enemy.y;
	if (enemy instanceof TripleShotEnemy) {
		enemy.shootInterval = 1620;
		enemy.shootTimer = 0;
	} else if (enemy instanceof TargetingEnemy) {
		enemy.shootInterval = 1440;
		enemy.shootTimer = 0;
	} else {
		enemy.shootInterval = 1080;
		enemy.shootTimer = 0;
	}
	enemies.push(enemy);
}
function damagePlayer() {
	if (spaceship.invulnerable) {
		return;
	}
	if (!spaceship.shieldActive) {
		lives--;
		spaceship.tripleShot = false;
		spaceship.tripleShotUnlimited = false;
		spaceship.activateInvulnerability(180);
		LK.effects.flashObject(spaceship, 0xff0000, 500);
		LK.getSound('explosion').play();
		if (lives <= 0) {
			LK.showGameOver();
			gameOver = true;
			return;
		}
	} else {
		spaceship.shieldActive = false;
		spaceship.tripleShot = false;
		spaceship.tripleShotUnlimited = false;
		spaceship.children[0].tint = 0xffffff;
		LK.effects.flashObject(spaceship, 0xff00ff, 300);
	}
	updateUI();
}
function createPowerUp(x, y) {
	var powerUp = game.addChild(new PowerUp());
	powerUp.x = x;
	powerUp.y = y;
	powerUp.lastY = y;
	var rand = Math.random();
	var type = 'life';
	if (rand < 0.5) {
		type = 'shield';
	} else if (rand < 0.75) {
		type = 'tripleshot';
	}
	powerUp.setType(type);
	powerUps.push(powerUp);
}
function advancePhase() {
	currentPhase++;
	if (currentPhase > 10) {
		LK.showYouWin();
		return;
	}
	enemiesDefeated = 0;
	totalEnemiesInPhase = 20 + (currentPhase - 1) * 10;
	activeTripleShotEnemies = 0;
	activeTargetingEnemies = 0;
	for (var i = enemies.length - 1; i >= 0; i--) {
		enemies[i].destroy();
		enemies.splice(i, 1);
	}
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		enemyBullets[i].destroy();
		enemyBullets.splice(i, 1);
	}
	updateUI();
}
game.down = function (x, y, obj) {
	spaceship.x = x;
	spaceship.y = y;
};
game.move = function (x, y, obj) {
	spaceship.x = x;
	spaceship.y = y;
};
game.update = function () {
	if (gameOver) return;
	updateUI();
	shootTimer++;
	if (shootTimer >= shootInterval) {
		shootTimer = 0;
		var bullet = game.addChild(new PlayerBullet());
		bullet.x = spaceship.x;
		bullet.y = spaceship.y - 40;
		bullet.lastY = bullet.y;
		playerBullets.push(bullet);
		LK.getSound('shoot').play();
		if (spaceship.tripleShot) {
			var bulletLeft = game.addChild(new PlayerBullet());
			bulletLeft.x = spaceship.x - 80;
			bulletLeft.y = spaceship.y - 40;
			bulletLeft.lastY = bulletLeft.y;
			bulletLeft.velocityX = -8;
			playerBullets.push(bulletLeft);
			var bulletRight = game.addChild(new PlayerBullet());
			bulletRight.x = spaceship.x + 80;
			bulletRight.y = spaceship.y - 40;
			bulletRight.lastY = bulletRight.y;
			bulletRight.velocityX = 8;
			playerBullets.push(bulletRight);
		}
	}
	spawnTimer++;
	if (spawnTimer >= spawnInterval && enemies.length < totalEnemiesInPhase) {
		spawnTimer = 0;
		spawnEnemy();
	}
	for (var i = enemies.length - 1; i >= 0; i--) {
		var enemy = enemies[i];
		var currentY = enemy.y;
		if (enemy.lastY < 2800 && currentY >= 2800) {
			if (enemy instanceof TripleShotEnemy) {
				activeTripleShotEnemies--;
			} else if (enemy instanceof TargetingEnemy) {
				activeTargetingEnemies--;
			}
			enemy.destroy();
			enemies.splice(i, 1);
			continue;
		}
		enemy.lastY = currentY;
		if (enemy.shootTimer !== undefined) {
			enemy.shootTimer++;
		}
		if (enemy.shootInterval !== undefined && enemy.shootTimer >= enemy.shootInterval) {
			enemy.shootTimer = 0;
			enemy.canShoot = true;
		}
		if (enemy.canShoot) {
			if (enemy instanceof TripleShotEnemy) {
				var centerBullet = game.addChild(new EnemyBullet());
				centerBullet.x = enemy.x;
				centerBullet.y = enemy.y;
				centerBullet.lastY = centerBullet.y;
				centerBullet.bulletId = enemyBullets.length;
				enemyBullets.push(centerBullet);
				enemy.currentBulletIds[0] = centerBullet.bulletId;
				var leftBullet = game.addChild(new EnemyBullet());
				leftBullet.x = enemy.x;
				leftBullet.y = enemy.y;
				leftBullet.lastY = leftBullet.y;
				leftBullet.velocityX = -6;
				leftBullet.bulletId = enemyBullets.length;
				enemyBullets.push(leftBullet);
				enemy.currentBulletIds[1] = leftBullet.bulletId;
				var rightBullet = game.addChild(new EnemyBullet());
				rightBullet.x = enemy.x;
				rightBullet.y = enemy.y;
				rightBullet.lastY = rightBullet.y;
				rightBullet.velocityX = 6;
				rightBullet.bulletId = enemyBullets.length;
				enemyBullets.push(rightBullet);
				enemy.currentBulletIds[2] = rightBullet.bulletId;
				LK.getSound('enemyShoot').play();
				enemy.canShoot = false;
			} else if (enemy instanceof TargetingEnemy) {
				var dx = spaceship.x - enemy.x;
				var dy = spaceship.y - enemy.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance > 0) {
					var targetBullet = game.addChild(new EnemyBullet());
					targetBullet.x = enemy.x;
					targetBullet.y = enemy.y;
					targetBullet.lastY = targetBullet.y;
					targetBullet.velocityX = dx / distance * 10;
					targetBullet.velocityY = dy / distance * 10;
					targetBullet.bulletId = enemyBullets.length;
					enemyBullets.push(targetBullet);
					enemy.currentBulletId = targetBullet.bulletId;
					LK.getSound('enemyShoot').play();
				} //{3g_fix}
				enemy.canShoot = false;
			} else {
				var eBullet = game.addChild(new EnemyBullet());
				eBullet.x = enemy.x;
				eBullet.y = enemy.y;
				eBullet.lastY = eBullet.y;
				eBullet.bulletId = enemyBullets.length;
				enemyBullets.push(eBullet);
				enemy.currentBulletId = eBullet.bulletId;
				LK.getSound('enemyShoot').play();
				enemy.canShoot = false;
			}
		}
		if (enemy.intersects(spaceship)) {
			damagePlayer();
			if (enemy instanceof TripleShotEnemy) {
				activeTripleShotEnemies--;
			} else if (enemy instanceof TargetingEnemy) {
				activeTargetingEnemies--;
			}
			enemy.destroy();
			enemies.splice(i, 1);
			LK.getSound('explosion').play();
			continue;
		}
	}
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var bullet = playerBullets[i];
		var currentY = bullet.y;
		if (bullet.lastY >= -30 && currentY < -30) {
			bullet.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		bullet.lastY = currentY;
		for (var j = enemies.length - 1; j >= 0; j--) {
			if (bullet.intersects(enemies[j])) {
				var enemyX = enemies[j].x;
				var enemyY = enemies[j].y;
				bullet.destroy();
				playerBullets.splice(i, 1);
				LK.effects.flashObject(enemies[j], 0xffff00, 200);
				var shouldDestroy = true;
				if (enemies[j] instanceof TargetingEnemy) {
					enemies[j].health--;
					if (enemies[j].health > 0) {
						shouldDestroy = false;
						LK.effects.flashObject(enemies[j], 0xff9900, 100);
					} //{2g_te}
				} else if (enemies[j] instanceof TripleShotEnemy) {
					enemies[j].health--;
					if (enemies[j].health > 0) {
						shouldDestroy = false;
						LK.effects.flashObject(enemies[j], 0xff6600, 100);
					} //{2g_tse}
				} //{2g_te2}
				if (shouldDestroy) {
					if (enemies[j] instanceof TripleShotEnemy) {
						activeTripleShotEnemies--;
					} else if (enemies[j] instanceof TargetingEnemy) {
						activeTargetingEnemies--;
					}
					enemies[j].destroy();
					enemies.splice(j, 1);
					enemiesDefeated++;
					LK.getSound('explosion').play();
					if (Math.random() < 0.1) {
						createPowerUp(enemyX, enemyY);
					}
					if (enemiesDefeated >= totalEnemiesInPhase) {
						advancePhase();
					}
				} //{2g_te3}
				break;
			}
		}
	}
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var eBullet = enemyBullets[i];
		var currentY = eBullet.y;
		if (eBullet.lastY < 2850 && currentY >= 2850) {
			eBullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		eBullet.lastY = currentY;
		if (eBullet.intersects(spaceship)) {
			damagePlayer();
			eBullet.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
	}
	for (var i = powerUps.length - 1; i >= 0; i--) {
		var powerUp = powerUps[i];
		var currentY = powerUp.y;
		if (powerUp.lastY <= 2800 && currentY > 2800) {
			powerUp.destroy();
			powerUps.splice(i, 1);
			continue;
		}
		powerUp.lastY = currentY;
		if (powerUp.intersects(spaceship)) {
			LK.getSound('powerUp').play();
			if (powerUp.type === 'life') {
				lives++;
			} else if (powerUp.type === 'shield') {
				spaceship.activateShield(300);
			} else if (powerUp.type === 'tripleshot') {
				spaceship.activateTripleShot(300);
			}
			powerUp.destroy();
			powerUps.splice(i, 1);
			updateUI();
			continue;
		}
	}
};
LK.playMusic('bgmusic');
updateUI();

===================================================================
--- original.js
+++ change.js
@@ -281,9 +281,9 @@
 		}
 		attempts++;
 	}
 	enemy.y = spawnY;
-	enemy.speed = 2 + (currentPhase - 1) * 0.3;
+	enemy.speed = 3 + (currentPhase - 1) * 0.45;
 	enemy.lastY = enemy.y;
 	if (enemy instanceof TripleShotEnemy) {
 		enemy.shootInterval = 1620;
 		enemy.shootTimer = 0;