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

/**** 
* Classes
****/ 
// Alien class
var Alien = Container.expand(function () {
	var self = Container.call(this);
	var alienAsset = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = alienAsset.width;
	self.height = alienAsset.height;
	self.hp = 2; // Each alien takes 2 hits (all aliens always 2 hits)
	self.isHit = false;
	self.hitTween = null;
	// For hit flash
	self.flash = function () {
		// If a previous hitTween is running, stop it
		if (self.hitTween) {
			tween.stop(alienAsset, {
				tint: true
			});
		}
		// Set alien to red tint
		alienAsset.tint = 0xff5252;
		// Tween back to normal color (no tint) over 120ms
		self.hitTween = tween(alienAsset, {
			tint: 0xffffff
		}, {
			duration: 120,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.hitTween = null;
			}
		});
	};
	// For movement
	self.speed = 8 + Math.random() * 4; // Slightly random speed
	self.update = function () {
		// Only move downwards, do not follow rocket's x position
		self.y += self.speed;
	};
	return self;
});
// Bigger Alien class (for level > 3, 3 hits to kill, larger)
var BiggerAlien = Container.expand(function () {
	var self = Container.call(this);
	var alienAsset = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	self.width = alienAsset.width * 1.5;
	self.height = alienAsset.height * 1.5;
	self.hp = 2; // Takes 2 hits (all enemies always 2 hits)
	self.isHit = false;
	self.hitTween = null;
	self.flash = function () {
		if (self.hitTween) {
			tween.stop(alienAsset, {
				tint: true
			});
		}
		alienAsset.tint = 0xff5252;
		self.hitTween = tween(alienAsset, {
			tint: 0xffffff
		}, {
			duration: 120,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.hitTween = null;
			}
		});
	};
	// For movement
	self.speed = 10 + Math.random() * 2; // Slightly slower than strong alien
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Boss Alien class (for level 7)
var BossAlien = Container.expand(function () {
	var self = Container.call(this);
	var bossAsset = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.7,
		scaleY: 1.7
	});
	self.width = bossAsset.width * 1.7;
	self.height = bossAsset.height * 1.7;
	self.hp = 2; // Boss takes 2 hits (all enemies always 2 hits)
	self.isHit = false;
	self.hitTween = null;
	self.flash = function () {
		if (self.hitTween) {
			tween.stop(bossAsset, {
				tint: true
			});
		}
		bossAsset.tint = 0xff5252;
		self.hitTween = tween(bossAsset, {
			tint: 0xffffff
		}, {
			duration: 120,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.hitTween = null;
			}
		});
	};
	self.speed = 10; // Boss is faster
	self.update = function () {
		// Only move downwards, do not follow rocket's x position
		self.y += self.speed;
	};
	return self;
});
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletAsset = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -32; // Upwards
	self.power = bulletPower; // Set bullet power at creation
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Enemy bullet class (alien shoots at player)
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletAsset = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	bulletAsset.tint = 0xff5252; // Red tint for enemy bullets
	self.speed = 27; // Downwards, 1.5x faster than before
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Rocket (player) class
var Rocket = Container.expand(function () {
	var self = Container.call(this);
	var rocketAsset = self.attachAsset('rocket', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = rocketAsset.width;
	self.height = rocketAsset.height;
	// For hit flash
	self.flashTween = null;
	// Show hit flash
	self.flash = function () {
		// If a previous flashTween is running, stop it
		if (self.flashTween) {
			tween.stop(rocketAsset, {
				tint: true
			});
		}
		// Set rocket to reddish tint
		rocketAsset.tint = 0xff5252;
		// Tween back to normal color (white) over 200ms
		self.flashTween = tween(rocketAsset, {
			tint: 0xffffff
		}, {
			duration: 200,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.flashTween = null;
			}
		});
	};
	return self;
});
// Star class for animated background stars
var Star = Container.expand(function () {
	var self = Container.call(this);
	// Use a larger ellipse for the star to make it more visible
	var size = 6 + Math.random() * 8; // Increased min and max size
	var starAsset = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: size / 160,
		scaleY: size / 160
	});
	// Brighter color choices for more visibility
	var colorChoices = [0xffffff, 0xe3f2fd, 0xfffde7, 0xb3e5fc, 0xfff9c4];
	starAsset.tint = colorChoices[Math.floor(Math.random() * colorChoices.length)];
	self.width = size;
	self.height = size;
	self.speed = 2.5 + Math.random() * 4.5;
	// Higher minimum alpha for more visible stars
	self.alpha = 0.7 + Math.random() * 0.3;
	self.update = function () {
		self.y += self.speed;
		if (self.y > GAME_HEIGHT + 10) {
			// Respawn at top
			self.y = -10;
			self.x = 10 + Math.random() * (GAME_WIDTH - 20);
			self.speed = 2.5 + Math.random() * 4.5;
			self.alpha = 0.7 + Math.random() * 0.3;
		}
	};
	return self;
});
// Strong Alien class (tougher, faster)
var StrongAlien = Container.expand(function () {
	var self = Container.call(this);
	var alienAsset = self.attachAsset('alien', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.2,
		scaleY: 1.2
	});
	self.width = alienAsset.width * 1.2;
	self.height = alienAsset.height * 1.2;
	self.hp = 2; // Strong alien takes 2 hits (all enemies always 2 hits)
	self.isHit = false;
	self.hitTween = null;
	self.flash = function () {
		if (self.hitTween) {
			tween.stop(alienAsset, {
				tint: true
			});
		}
		alienAsset.tint = 0xff5252;
		self.hitTween = tween(alienAsset, {
			tint: 0xffffff
		}, {
			duration: 120,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.hitTween = null;
			}
		});
	};
	// For movement
	self.speed = 12 + Math.random() * 3; // Stronger and faster
	self.update = function () {
		// Only move downwards, do not follow rocket's x position
		self.y += self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game constants
// Rocket (player)
// Alien (enemy)
// Bullet
// Alien hit flash
// Life bar
// Life bar background
var GAME_WIDTH = 2048;
var GAME_HEIGHT = 2732;
// --- Kill Counter (top right) ---
var killNumberText = new Text2("0", {
	size: 68,
	fill: "#fff",
	font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
	shadow: {
		color: 0x1976D2,
		blur: 8,
		offsetX: 0,
		offsetY: 2
	}
});
killNumberText.anchor.set(1, 0); // right anchor, top edge
killNumberText.x = GAME_WIDTH - 40;
killNumberText.y = 40;
LK.gui.top.addChild(killNumberText);
// --- Starfield background ---
var stars = [];
var STAR_COUNT = 60;
for (var i = 0; i < STAR_COUNT; ++i) {
	var star = new Star();
	star.x = 10 + Math.random() * (GAME_WIDTH - 20);
	star.y = Math.random() * GAME_HEIGHT;
	stars.push(star);
	game.addChildAt(star, 0); // Add behind all other objects
}
var ROCKET_START_LIFE = 5;
var LEVEL_TO_BOSS = 7;
// Game state
var rocket = null;
var bullets = [];
var aliens = [];
var level = 1;
var rocketLife = ROCKET_START_LIFE;
var bulletPower = 1; // Bullet power, increases every level
var canShoot = true;
var shootCooldown = 0;
var dragNode = null;
var lastMoveX = 0;
var lastMoveY = 0;
var score = 0;
var bossSpawned = false;
var enemyBullets = []; // Track enemy bullets
// --- Shield state for rocket ---
var rocketShieldActive = false;
var rocketShieldTimer = 0;
var rocketShieldVisual = null;
// GUI elements
var scoreTxt = new Text2('0', {
	size: 90,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 1);
// Ensure score is always visible
scoreTxt.alpha = 1;
scoreTxt.visible = true;
// Position the score text horizontally aligned with the rocket, above it
scoreTxt.x = GAME_WIDTH / 2;
scoreTxt.y = GAME_HEIGHT - 400 - (rocket ? rocket.height / 2 : 110) - 40; // 40px above rocket top, fallback if rocket not yet created
LK.gui.top.addChild(scoreTxt);
if (LK.gui.top.children && LK.gui.top.children.length > 1) {
	LK.gui.top.setChildIndex(scoreTxt, LK.gui.top.children.length - 1);
}
// New health bar will be created below
// updateLevelBar and updateLevelText helpers removed as level bar is no longer shown
// Helper to update score text
function updateScoreText() {
	scoreTxt.setText(score);
	// Update kill counter text (if defined)
	if (typeof killCounterText !== "undefined") {
		killCounterText.setText(score.toString());
	}
	// Update kill number text (top right)
	if (typeof killNumberText !== "undefined") {
		killNumberText.setText(score.toString());
	}
	// Update health bar kill counter text (if defined)
	if (typeof healthBarKillCounterText !== "undefined") {
		healthBarKillCounterText.setText(score.toString());
	}
	// Update rocket kill counter text (above rocket)
	if (typeof rocketKillCounterText !== "undefined") {
		rocketKillCounterText.setText(score.toString());
	}
	// updateLevelBar removed
}
// Spawn a new alien
function spawnAlien() {
	var alien;
	if (level === LEVEL_TO_BOSS && !bossSpawned) {
		alien = new BossAlien();
		alien.hp = 2; // Boss always 2 hits
		bossSpawned = true;
	} else {
		// 20% chance to spawn a BiggerAlien after level 3, 30% StrongAlien, otherwise normal Alien
		if (level > 3 && Math.random() < 0.2) {
			alien = new BiggerAlien();
			alien.hp = 2; // Always 2 hits for bigger alien
		} else if (Math.random() < 0.3 && level > 2) {
			alien = new StrongAlien();
			alien.hp = 2; // Always 2 hits for strong alien
		} else {
			alien = new Alien();
			alien.hp = 2; // Always 2 hits for normal alien
		}
	}
	// Defensive: always set hp to 2 for all enemy types
	if (alien) {
		alien.hp = 2;
		// 1. seviyede düşmanlar 1.5 kat hızlı gelsin
		if (level === 1 && typeof alien.speed === "number") {
			alien.speed *= 1.5;
		}
	}
	// Random x, but keep inside screen
	var margin = 120;
	alien.x = margin + Math.random() * (GAME_WIDTH - margin * 2);
	alien.y = -alien.height / 2;
	aliens.push(alien);
	game.addChild(alien);
}
// Reset game state
function resetGame() {
	// Remove all bullets and aliens
	for (var i = 0; i < bullets.length; ++i) {
		bullets[i].destroy();
	}
	for (var j = 0; j < aliens.length; ++j) {
		aliens[j].destroy();
	}
	for (var k = 0; k < enemyBullets.length; ++k) {
		enemyBullets[k].destroy();
	}
	bullets = [];
	aliens = [];
	enemyBullets = [];
	level = 1;
	rocketLife = ROCKET_START_LIFE;
	bulletPower = 1; // Always 1, so all enemies take 2 hits
	canShoot = true;
	shootCooldown = 0;
	dragNode = null;
	lastMoveX = 0;
	lastMoveY = 0;
	score = 0;
	bossSpawned = false;
	// updateLevelText and updateLevelBar removed
	updateScoreText();
	updateLevelBar();
	updateHealthBar();
}
// Initialize rocket
rocket = new Rocket();
rocket.x = GAME_WIDTH / 2;
rocket.y = GAME_HEIGHT - 400;
game.addChild(rocket);
// --- Rocket health bar that follows rocket ---
var rocketLifeBarBg = LK.getAsset('lifeBarBg', {
	anchorX: 0.5,
	anchorY: 0,
	x: 0,
	y: 0,
	width: 220,
	height: 18
});
var rocketLifeBar = LK.getAsset('lifeBar', {
	anchorX: 0,
	anchorY: 0,
	x: -110,
	y: 0,
	width: 220,
	height: 18
});
var rocketLifeBarContainer = new Container();
rocketLifeBarContainer.addChild(rocketLifeBarBg);
rocketLifeBarContainer.addChild(rocketLifeBar);
rocketLifeBarContainer.x = rocket.x;
rocketLifeBarContainer.y = rocket.y + rocket.height / 2 + 12; // 12px below rocket
game.addChild(rocketLifeBarContainer);
// Move scoreTxt to be above the rocket, horizontally aligned
scoreTxt.x = rocket.x;
scoreTxt.y = rocket.y - rocket.height / 2 - 40; // 40px above rocket top
// --- Kill Counter above Rocket ---
// Create kill counter text to be placed above the rocket
var rocketKillCounterText = new Text2("0", {
	size: 54,
	fill: "#fff",
	font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
	shadow: {
		color: 0x1976D2,
		blur: 8,
		offsetX: 0,
		offsetY: 2
	}
});
rocketKillCounterText.anchor.set(0.5, 1); // center anchor, bottom edge
rocketKillCounterText.x = rocket.x;
rocketKillCounterText.y = rocket.y - rocket.height / 2 - 60; // 60px above rocket top
game.addChild(rocketKillCounterText);
// --- New Health Bar (top center) ---
var healthBarBg = LK.getAsset('lifeBarBg', {
	anchorX: 0.5,
	anchorY: 0.5,
	width: 440,
	height: 44,
	x: 0,
	y: 0
});
var healthBar = LK.getAsset('lifeBar', {
	anchorX: 0,
	anchorY: 0.5,
	width: 400,
	height: 36,
	x: -200,
	y: 0
});
var healthBarContainer = new Container();
healthBarContainer.addChild(healthBarBg);
healthBarContainer.addChild(healthBar);
healthBarContainer.x = GAME_WIDTH / 2;
healthBarContainer.y = 110;
LK.gui.top.addChild(healthBarContainer);
// --- Kill Counter below Health Bar (top center) ---
var healthBarKillCounterText = new Text2("0", {
	size: 54,
	fill: "#fff",
	font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
	shadow: {
		color: 0x1976D2,
		blur: 8,
		offsetX: 0,
		offsetY: 2
	}
});
healthBarKillCounterText.anchor.set(0.5, 0); // center anchor, top edge
healthBarKillCounterText.x = GAME_WIDTH / 2;
healthBarKillCounterText.y = healthBarContainer.y + 32; // just below health bar
LK.gui.top.addChild(healthBarKillCounterText);
// Helper to update health bar
function updateHealthBar() {
	var percent = rocketLife / ROCKET_START_LIFE;
	if (percent < 0) {
		percent = 0;
	}
	if (percent > 1) {
		percent = 1;
	}
	healthBar.width = 400 * percent;
	if (percent > 0.5) {
		healthBar.tint = 0x43a047;
	} else if (percent > 0.2) {
		healthBar.tint = 0xffc107;
	} else {
		healthBar.tint = 0xd32f2f;
	}
}
// Initial GUI
// updateLevelText and updateLevelBar removed
updateScoreText();
updateHealthBar();
// Touch/move controls
game.down = function (x, y, obj) {
	// Only start drag if touch is on rocket
	var local = rocket.toLocal(game.toGlobal({
		x: x,
		y: y
	}));
	if (local.x > -rocket.width / 2 && local.x < rocket.width / 2 && local.y > -rocket.height / 2 && local.y < rocket.height / 2) {
		dragNode = rocket;
		lastMoveX = x;
		lastMoveY = y;
	}
};
game.move = function (x, y, obj) {
	// Always move the rocket to the mouse/touch position, clamped to screen
	var newX = x;
	var halfW = rocket && rocket.width ? rocket.width / 2 : 70; // fallback to 70 if rocket is null
	if (newX < halfW) {
		newX = halfW;
	}
	if (newX > GAME_WIDTH - halfW) {
		newX = GAME_WIDTH - halfW;
	}
	if (rocket) {
		rocket.x = newX;
		// Y position stays fixed at the starting Y
		rocket.y = GAME_HEIGHT - 400;
	}
	lastMoveX = x;
	lastMoveY = y;
};
game.up = function (x, y, obj) {
	dragNode = null;
};
// Tap to shoot (left mouse button or tap)
game.down = function (x, y, obj) {
	// Only start drag if touch is on rocket
	var local = rocket.toLocal(game.toGlobal({
		x: x,
		y: y
	}));
	if (local.x > -rocket.width / 2 && local.x < rocket.width / 2 && local.y > -rocket.height / 2 && local.y < rocket.height / 2) {
		dragNode = rocket;
		lastMoveX = x;
		lastMoveY = y;
	}
	// Always allow shooting with left mouse button/tap, regardless of drag state
	if (canShoot) {
		shootBullet();
	}
};
// Shoot bullet
function shootBullet() {
	if (!canShoot) {
		return;
	}
	var bullet = new Bullet();
	bullet.x = rocket.x;
	bullet.y = rocket.y - rocket.height / 2 - 20;
	bullets.push(bullet);
	game.addChild(bullet);
	// Play laser gun sound effect
	LK.getSound('dfds').play();
	canShoot = false;
	shootCooldown = 10; // 10 ticks cooldown
}
// Main update loop
game.update = function () {
	// Shooting cooldown
	if (!canShoot) {
		shootCooldown--;
		if (shootCooldown <= 0) {
			canShoot = true;
		}
	}
	// --- Shield logic update ---
	if (rocketShieldActive) {
		rocketShieldTimer--;
		// Keep shield visual in sync with rocket
		if (rocket && rocketShieldVisual && rocket.children.indexOf(rocketShieldVisual) === -1) {
			rocket.addChild(rocketShieldVisual);
			if (rocket.children.length > 1) {
				rocket.setChildIndex(rocketShieldVisual, 0);
			}
		}
		if (rocketShieldTimer <= 0) {
			rocketShieldActive = false;
			rocketShieldTimer = 0;
			// Remove shield visual
			if (rocketShieldVisual && rocket) {
				rocket.removeChild(rocketShieldVisual);
			}
			rocketShieldVisual = null;
		}
	} else {
		// Defensive: remove shield visual if not active
		if (rocketShieldVisual && rocket) {
			rocket.removeChild(rocketShieldVisual);
			rocketShieldVisual = null;
		}
	}
	// Update stars
	for (var si = 0; si < stars.length; ++si) {
		stars[si].update();
	}
	// Keep score counter aligned with rocket
	scoreTxt.x = rocket.x;
	scoreTxt.y = rocket.y - rocket.height / 2 - 40; // 40px above rocket top
	// Move rocket kill counter above rocket
	if (typeof rocketKillCounterText !== "undefined" && rocket) {
		rocketKillCounterText.x = rocket.x;
		rocketKillCounterText.y = rocket.y - rocket.height / 2 - 60;
	}
	// Move kill counter to the right of the rocket, just above it
	if (typeof killCounterText !== "undefined" && rocket) {
		killCounterText.x = rocket.x + rocket.width / 2 + 32;
		killCounterText.y = rocket.y - rocket.height / 2 - 40;
	}
	// Move rocket health bar with rocket
	if (typeof rocketLifeBarContainer !== "undefined") {
		rocketLifeBarContainer.x = rocket.x;
		rocketLifeBarContainer.y = rocket.y + rocket.height / 2 + 12; // 12px below rocket
		// Update width and color
		var percent = rocketLife / ROCKET_START_LIFE;
		if (percent < 0) {
			percent = 0;
		}
		rocketLifeBar.width = 220 * percent;
		if (percent > 0.5) {
			rocketLifeBar.tint = 0x43a047;
		} else if (percent > 0.2) {
			rocketLifeBar.tint = 0xffc107;
		} else {
			rocketLifeBar.tint = 0xd32f2f;
		}
		// Do NOT change rocket color based on health
	}
	// (level bar stays fixed in GUI, do not move with rocket)
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; --i) {
		var b = bullets[i];
		b.update();
		// Remove if off screen
		if (b.y < -100) {
			b.destroy();
			bullets.splice(i, 1);
			continue;
		}
	}
	// Update aliens
	for (var j = aliens.length - 1; j >= 0; --j) {
		var a = aliens[j];
		a.update();
		// Remove if off screen
		if (a.y > GAME_HEIGHT + 200) {
			a.destroy();
			aliens.splice(j, 1);
			continue;
		}
		// Alien shooting logic: all aliens shoot every eligible tick (no randomness, no alignment check)
		if (level > 1 && a.y > 0 && a.y < GAME_HEIGHT - 400) {
			if (LK.ticks % Math.max(60 - level * 4, 18) === 0) {
				if (level >= 5) {
					// Shoot two bullets, slightly offset horizontally
					var offset = 38;
					for (var bidx = -1; bidx <= 1; bidx += 2) {
						var enemyBullet = new EnemyBullet();
						enemyBullet.x = a.x + bidx * offset;
						enemyBullet.y = a.y + a.height / 2 + 10;
						enemyBullets.push(enemyBullet);
						game.addChild(enemyBullet);
					}
				} else {
					// Shoot one bullet as before
					var enemyBullet = new EnemyBullet();
					enemyBullet.x = a.x;
					enemyBullet.y = a.y + a.height / 2 + 10;
					enemyBullets.push(enemyBullet);
					game.addChild(enemyBullet);
				}
			}
		}
		// Check collision with rocket (alien-rocket contact)
		if (a.intersects(rocket)) {
			if (!rocketShieldActive && rocketLife > 0) {
				rocketLife--;
				updateHealthBar();
				rocket.flash();
				// Destroy rocket if it has taken 5 damage
				if (rocketLife <= 0) {
					// Play rocket explosion sound when rocket's life reaches zero
					LK.getSound('patlama').play();
					if (rocket && typeof rocket.destroy === "function") {
						rocket.destroy();
						rocket = null;
					}
				}
			}
			// Remove alien on contact
			a.destroy();
			aliens.splice(j, 1);
			// Check for game over
			if (rocketLife <= 0) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.getSound('patlama').play();
				LK.showGameOver();
				return;
			}
		}
		// No alien-rocket collision: aliens do not damage rocket by contact
	}
	// Update enemy bullets
	for (var eb = enemyBullets.length - 1; eb >= 0; --eb) {
		var ebull = enemyBullets[eb];
		ebull.update();
		// Remove if off screen
		if (ebull.y > GAME_HEIGHT + 100) {
			ebull.destroy();
			enemyBullets.splice(eb, 1);
			continue;
		}
		// Check collision with rocket
		if (ebull.intersects(rocket)) {
			if (!rocketShieldActive && rocketLife > 0) {
				if (level >= 6) {
					rocketLife = 0;
				} else {
					rocketLife -= 0.5;
				}
				updateHealthBar();
				rocket.flash();
				// Destroy rocket if it has taken 5 damage
				if (rocketLife <= 0) {
					if (rocket && typeof rocket.destroy === "function") {
						// Play rocket explosion sound
						LK.getSound('patlama').play();
						rocket.destroy();
						rocket = null;
					}
				}
			}
			ebull.destroy();
			enemyBullets.splice(eb, 1);
			// Check for game over
			if (rocketLife <= 0) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				return;
			}
		}
	}
	// Bullet-alien collisions
	for (var i2 = bullets.length - 1; i2 >= 0; --i2) {
		var b2 = bullets[i2];
		for (var j2 = aliens.length - 1; j2 >= 0; --j2) {
			var a2 = aliens[j2];
			if (b2.intersects(a2)) {
				a2.hp -= b2.power !== undefined ? b2.power : 1; // Use bullet power, fallback to 1
				a2.flash();
				b2.destroy();
				bullets.splice(i2, 1);
				if (a2.hp <= 0) {
					a2.destroy();
					aliens.splice(j2, 1);
					score++;
					updateScoreText();
					updateLevelBar();
					// Increase level every 10 kills
					if (level < LEVEL_TO_BOSS && score % 10 === 0) {
						level++;
						// Flash the screen to indicate level up
						LK.effects.flashScreen(0xffffff, 600); // White flash for 600ms
						// Activate 4s shield when reaching level 3
						if (level === 3) {
							rocketShieldActive = true;
							rocketShieldTimer = 240; // 4 seconds at 60 FPS
							// Add shield visual if not present
							if (!rocketShieldVisual && rocket) {
								rocketShieldVisual = LK.getAsset('centerCircle', {
									anchorX: 0.5,
									anchorY: 0.5,
									scaleX: 2.1,
									scaleY: 2.1,
									x: 0,
									y: 0,
									color: 0x2196f3,
									tint: 0x2196f3
								});
								rocketShieldVisual.alpha = 0.38;
								rocket.addChild(rocketShieldVisual);
								// Make sure shield is behind rocket sprite
								if (rocket.children.length > 1) {
									rocket.setChildIndex(rocketShieldVisual, 0);
								}
							}
						}
						// End game after level 6 (when level becomes 7)
						if (level === LEVEL_TO_BOSS) {
							LK.effects.flashScreen(0x00e676, 1000);
							LK.showYouWin();
							return;
						}
						bulletPower = 1; // Always 1, so all enemies take 2 hits
						rocketLife = ROCKET_START_LIFE; // Full heal on level up
						updateHealthBar();
						updateLevelBar();
						// Star explosion effect at center of screen
						for (var sx = 0; sx < 18; ++sx) {
							(function (sx) {
								var star = new Star();
								star.x = GAME_WIDTH / 2;
								star.y = GAME_HEIGHT / 2;
								// Give each star a random direction and speed
								var angle = Math.PI * 2 * (sx / 18);
								var speed = 18 + Math.random() * 12;
								var vx = Math.cos(angle) * speed;
								var vy = Math.sin(angle) * speed;
								var life = 32 + Math.floor(Math.random() * 16);
								var tick = 0;
								// Animate star outward and fade out
								star.update = function () {
									star.x += vx;
									star.y += vy;
									star.alpha -= 0.025;
									tick++;
									if (tick > life || star.alpha <= 0) {
										star.destroy();
									}
								};
								game.addChild(star);
							})(sx);
						}
						// Change all background star colors
						var colorChoices = [0xffffff, 0xe3f2fd, 0xfffde7, 0xb3e5fc, 0xfff9c4, 0xffb3c6, 0xc5e1a5, 0xffcc80, 0x90caf9, 0xf8bbd0];
						for (var sc = 0; sc < stars.length; ++sc) {
							var starObj = stars[sc];
							// Only change tint if starObj has children and a valid asset
							if (starObj.children && starObj.children.length > 0 && starObj.children[0]) {
								var newColor = colorChoices[Math.floor(Math.random() * colorChoices.length)];
								starObj.children[0].tint = newColor;
							}
						}
						// Add more stars to the background on each level up
						var additionalStars = 8; // Number of stars to add per level up
						for (var addStar = 0; addStar < additionalStars; ++addStar) {
							var newStar = new Star();
							newStar.x = 10 + Math.random() * (GAME_WIDTH - 20);
							newStar.y = Math.random() * GAME_HEIGHT;
							stars.push(newStar);
							game.addChildAt(newStar, 0); // Add behind all other objects
						}
					}
					// If boss defeated, win
					if (level === LEVEL_TO_BOSS && bossSpawned && aliens.length === 0) {
						LK.effects.flashScreen(0x00e676, 1000);
						LK.showYouWin();
						return;
					}
				}
				break;
			}
		}
	}
	// Alien spawn logic
	if (level < LEVEL_TO_BOSS) {
		// Increase max aliens on screen as level increases
		var maxAliens = 2 + Math.floor((level - 1) / 2); // +1 every 2 levels (2,3,4,5...)
		// Double the number of aliens on level 5 and above
		if (level >= 5) {
			maxAliens *= 2;
		}
		// Increase spawn rate as level increases
		var spawnRate = Math.max(1, 1 + Math.floor((level - 1) / 2)); // +1 spawn per 2 levels
		if (level >= 5) {
			spawnRate *= 2;
		}
		if (aliens.length < maxAliens && LK.ticks % (60 - level * 4) === 0) {
			for (var s = 0; s < spawnRate && aliens.length < maxAliens; ++s) {
				spawnAlien();
			}
		}
	} else if (level === LEVEL_TO_BOSS && !bossSpawned) {
		// Spawn boss
		spawnAlien();
	}
};
// --- Level Bar (next to Seviye text) ---
// Level text
var levelText = new Text2("Seviye", {
	size: 68,
	fill: "#fff",
	font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
	shadow: {
		color: 0x1976D2,
		blur: 8,
		offsetX: 0,
		offsetY: 2
	}
});
levelText.anchor.set(1, 0.5);
// Level bar background
var levelBarBg = LK.getAsset('lifeBarBg', {
	anchorX: 0,
	anchorY: 0.5,
	width: 420,
	height: 64,
	x: 0,
	y: 0
});
// Level bar fill (fills with each kill)
var levelBar = LK.getAsset('centerCircle', {
	anchorX: 0,
	anchorY: 0.5,
	width: 420,
	height: 48,
	x: 0,
	y: 0,
	color: 0x2196f3,
	tint: 0x2196f3 // blue
});
// Container for text and bar
var levelBarContainer = new Container();
// Kill counter text (will be placed to the right of the rocket)
var killCounterText = new Text2("0", {
	size: 68,
	fill: "#fff",
	font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
	shadow: {
		color: 0x1976D2,
		blur: 8,
		offsetX: 0,
		offsetY: 2
	}
});
killCounterText.anchor.set(0, 0.5); // left anchor for right-of-rocket placement
// Level number text (shows current level, right of 'Seviye')
var levelNumberText = new Text2(level.toString(), {
	size: 68,
	fill: "#fff",
	font: "'GillSans-Bold',Impact,'Arial Black',Tahoma",
	shadow: {
		color: 0x1976D2,
		blur: 8,
		offsetX: 0,
		offsetY: 2
	}
});
levelText.anchor.set(1, 0.5);
levelNumberText.anchor.set(0, 0.5);
// Place 'Seviye', then bar, then number (kill counter will be right of rocket, not in this container)
levelText.x = 0;
levelText.y = 0;
var gapBetween = 24; // small gap between 'Seviye' and bar
var barStartX = levelText.x + levelText.width + gapBetween;
levelBarBg.x = barStartX;
levelBar.x = barStartX;
levelBarBg.y = 0;
levelBar.y = 0;
// Center the level number between 'Seviye' and the bar
levelNumberText.x = barStartX / 2 + levelText.x / 2 - levelNumberText.width / 2;
levelNumberText.y = 0;
// Only add levelText, levelNumberText, levelBarBg, levelBar to container
levelBarContainer.addChild(levelText);
levelBarContainer.addChild(levelNumberText);
levelBarContainer.addChild(levelBarBg);
levelBarContainer.addChild(levelBar);
// Position: move level bar container further left (reduce left margin)
levelBarContainer.x = 10;
levelBarContainer.y = 66;
LK.gui.top.addChild(levelBarContainer);
// Place kill counter to the right of the rocket, just above it
killCounterText.x = typeof rocket !== "undefined" && rocket ? rocket.x + (rocket.width ? rocket.width / 2 : 70) + 32 : GAME_WIDTH / 2 + 140;
killCounterText.y = typeof rocket !== "undefined" && rocket ? rocket.y - (rocket.height ? rocket.height / 2 : 110) - 40 : GAME_HEIGHT - 400 - 110 - 40;
LK.gui.top.addChild(killCounterText);
// Helper to update level bar and level text
function updateLevelBar() {
	// Progress to next level: score % 10 (10 kills per level)
	var killsThisLevel = score % 10;
	if (killsThisLevel < 0) {
		killsThisLevel = 0;
	}
	if (killsThisLevel > 10) {
		killsThisLevel = 10;
	}
	// Each kill paints a segment of the bar
	var segmentCount = 10;
	var segmentWidth = 420 / segmentCount; // Match new bar width
	var targetWidth = segmentWidth * killsThisLevel;
	// Animate the level bar fill width to visually show progress
	if (typeof levelBar.lastWidth === "undefined") {
		levelBar.lastWidth = 0;
	}
	if (Math.abs(levelBar.width - targetWidth) > 2) {
		// Animate width smoothly
		if (!levelBar.widthTween) {
			levelBar.widthTween = tween(levelBar, {
				width: targetWidth
			}, {
				duration: 250,
				easing: tween.linear,
				onFinish: function onFinish() {
					levelBar.widthTween = null;
					levelBar.width = targetWidth;
					levelBar.lastWidth = targetWidth;
				}
			});
		}
	} else {
		// Snap to target if very close
		if (levelBar.widthTween) {
			tween.stop(levelBar, {
				width: true
			});
			levelBar.widthTween = null;
		}
		levelBar.width = targetWidth;
		levelBar.lastWidth = targetWidth;
	}
	// Color: fill blue on every kill
	levelBar.tint = 0x2196f3; // blue
	// Update level text (static, just "Seviye")
	if (typeof levelText !== "undefined") {
		levelText.setText("Seviye");
	}
	// Update level number text to show current level
	if (typeof levelNumberText !== "undefined") {
		levelNumberText.setText(level.toString());
	}
}
// Update level bar on score change and level up
var oldUpdateScoreText = updateScoreText;
updateLevelBar();
// Initial spawn
spawnAlien();
// Play background music at game start
LK.playMusic('Bckgrnd');
// Play background music at game start
LK.playMusic('Bckgrnd');