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

/**** 
* Classes
****/ 
// Boss ship
var BossShip = Container.expand(function () {
	var self = Container.call(this);
	var bossSprite = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 2.2,
		scaleY: 2.2
	});
	self.radius = bossSprite.width * 0.5;
	self.hp = 20;
	self.update = function () {
		// Boss movement: simple horizontal oscillation
		if (!self.dir) self.dir = 1;
		self.x += self.dir * 10;
		if (self.x > 2048 - self.radius - 40) self.dir = -1;
		if (self.x < self.radius + 40) self.dir = 1;
		// Boss shooting logic
		if (self.shootCooldown === undefined) self.shootCooldown = 86;
		self.shootCooldown--;
		if (self.shootCooldown <= 0) {
			// Fire 3-way spread
			for (var i = 0; i < 3; i++) {
				var bullet = new EnemyBullet();
				bullet.x = self.x;
				bullet.y = self.y + self.radius;
				// Add spread: -0.2, 0, +0.2 radians
				bullet.angle = -0.2 + 0.2 * i;
				bullet.update = function (origUpdate, angle) {
					return function () {
						this.x += Math.sin(angle) * 12;
						this.y += Math.cos(angle) * this.speed;
					};
				}(bullet.update, bullet.angle);
				if (typeof enemyBullets !== "undefined") {
					enemyBullets.push(bullet);
				}
				if (typeof game !== "undefined") {
					game.addChild(bullet);
				}
			}
			self.shootCooldown = 86;
		}
	};
	return self;
});
// Enemy bullet
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bullet = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 18;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Enemy ship
var EnemyShip = Container.expand(function () {
	var self = Container.call(this);
	var enemy = self.attachAsset('enemyShip', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 3 + Math.random() * 2;
	self.shootCooldown = 60 + Math.floor(Math.random() * 60);
	self.radius = enemy.width * 0.5;
	self.update = function () {
		self.y += self.speed;
		self.shootCooldown--;
	};
	return self;
});
// Player bullet
var PlayerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bullet = self.attachAsset('playerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -32;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
// Player spaceship
var Spaceship = Container.expand(function () {
	var self = Container.call(this);
	var ship = self.attachAsset('spaceship', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = ship.width * 0.5;
	self.invincible = false;
	self.update = function () {};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000010
});

/**** 
* Game Code
****/ 
// Game variables
// Spaceship (player)
// Player bullet
// Enemy ship
// Enemy bullet
// Asteroid
// Powerup
// Add background image to the game scene
function spawnBoss() {
	if (bossActive) return;
	boss = new BossShip();
	boss.x = 2048 / 2;
	boss.y = 400;
	bossActive = true;
	game.addChild(boss);
}
var background = LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
});
game.addChild(background);
var player;
var playerBullets = [];
var enemies = [];
var enemyBullets = [];
// Boss variables must be defined in global scope for all functions to access
var boss = null;
var bossActive = false;
var dragNode = null;
var lastPlayerX = 0,
	lastPlayerY = 0;
var canShoot = true;
var shootCooldown = 0;
var score = 0;
// Player lives
var playerLives = 3;
var livesTxt = new Text2('♥ x3', {
	size: 90,
	fill: 0xFF4444
});
livesTxt.anchor.set(0.5, 0);
livesTxt.x = 2048 / 2;
LK.gui.top.addChild(livesTxt);
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
function spawnPlayer() {
	player = new Spaceship();
	player.x = 2048 / 2;
	player.y = 2732 - 350;
	game.addChild(player);
}
function spawnEnemy() {
	var enemy = new EnemyShip();
	enemy.x = 200 + Math.random() * (2048 - 400);
	enemy.y = -100;
	enemies.push(enemy);
	game.addChild(enemy);
}
function firePlayerBullet() {
	if (!player || player.invincible) return;
	if (player.tripleShot && player.tripleShot > 0) {
		// Fire 3-way spread
		for (var i = 0; i < 3; i++) {
			var bullet = new PlayerBullet();
			bullet.x = player.x;
			bullet.y = player.y - player.radius;
			// Add spread: -0.2, 0, +0.2 radians
			bullet.angle = -0.2 + 0.2 * i;
			bullet.update = function (origUpdate, angle) {
				return function () {
					this.x += Math.sin(angle) * 16;
					this.y += Math.cos(angle) * this.speed;
				};
			}(bullet.update, bullet.angle);
			playerBullets.push(bullet);
			game.addChild(bullet);
		}
		player.tripleShot--;
		if (player.tripleShot <= 0) {
			player.tripleShot = 0;
		}
	} else {
		var bullet = new PlayerBullet();
		bullet.x = player.x;
		bullet.y = player.y - player.radius;
		playerBullets.push(bullet);
		game.addChild(bullet);
	}
}
function fireEnemyBullet(enemy) {
	var bullet = new EnemyBullet();
	bullet.x = enemy.x;
	bullet.y = enemy.y + enemy.radius;
	enemyBullets.push(bullet);
	game.addChild(bullet);
}
function resetGame() {
	// Not needed, handled by LK.showGameOver
}
// Dragging and shooting
game.down = function (x, y, obj) {
	if (!player) return;
	dragNode = player;
	lastPlayerX = x;
	lastPlayerY = y;
};
game.up = function (x, y, obj) {
	dragNode = null;
};
function handleMove(x, y, obj) {
	if (dragNode === player) {
		// Clamp to game area, avoid top 100px (menu)
		var minX = player.radius + 20;
		var maxX = 2048 - player.radius - 20;
		var minY = 120 + player.radius;
		var maxY = 2732 - player.radius - 20;
		player.x = Math.max(minX, Math.min(maxX, x));
		player.y = Math.max(minY, Math.min(maxY, y));
	}
}
game.move = handleMove;
// Automatic player bullet firing handled in game.update (removed tap-to-shoot)
// Main update loop
game.update = function () {
	// Player automatic shooting
	if (!player.invincible) {
		if (!canShoot) {
			shootCooldown--;
			if (shootCooldown <= 0) {
				canShoot = true;
			}
		}
		if (canShoot) {
			firePlayerBullet();
			canShoot = false;
			shootCooldown = 10;
		}
	}
	// Update player
	if (player) player.update();
	// Update and remove player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var b = playerBullets[i];
		b.update();
		if (b.y < -80) {
			b.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Check collision with enemies
		for (var j = enemies.length - 1; j >= 0; j--) {
			var e = enemies[j];
			if (b.intersects(e)) {
				// Destroy both
				b.destroy();
				playerBullets.splice(i, 1);
				e.destroy();
				enemies.splice(j, 1);
				// 25% chance to drop 3-way shot powerup
				if (Math.random() < 0.25) {
					if (typeof spawnPowerup === "function") {
						spawnPowerup(e.x, e.y);
					}
				}
				score += 1;
				scoreTxt.setText(score);
				// Boss spawn check: every 30 points
				if (score % 30 === 0 && score > 0) {
					if (typeof spawnBoss === "function") {
						spawnBoss();
					}
				}
				break;
			}
		}
	}
	// Update and remove enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		var e = enemies[i];
		e.update();
		if (e.y > 2732 + 100) {
			e.destroy();
			enemies.splice(i, 1);
			continue;
		}
		// Enemy shooting
		if (e.shootCooldown <= 0) {
			fireEnemyBullet(e);
			// Increase cooldown for less frequent enemy bullets
			e.shootCooldown = 180 + Math.floor(Math.random() * 90);
		}
		// Collision with player
		if (player && !player.invincible && e.intersects(player)) {
			LK.effects.flashScreen(0xff0000, 800);
			playerLives--;
			livesTxt.setText('♥ x' + playerLives);
			if (playerLives <= 0) {
				LK.showGameOver();
				return;
			} else {
				// Respawn player
				player.destroy();
				spawnPlayer();
				return;
			}
		}
	}
	// Powerup collision with player (player must collect the powerup)
	if (typeof powerups !== "undefined") {
		for (var k = powerups.length - 1; k >= 0; k--) {
			var p = powerups[k];
			if (player && p.intersects(player)) {
				// Grant triple shot for 10 shots
				player.tripleShot = 10;
				p.destroy();
				powerups.splice(k, 1);
			}
		}
	}
	// Update and remove enemy bullets
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var b = enemyBullets[i];
		b.update();
		if (b.y > 2732 + 80) {
			b.destroy();
			enemyBullets.splice(i, 1);
			continue;
		}
		// Collision with player
		if (player && !player.invincible && b.intersects(player)) {
			LK.effects.flashScreen(0xff0000, 800);
			playerLives--;
			livesTxt.setText('♥ x' + playerLives);
			// score += 1; // Removed: No score for being hit by enemy bullet
			// scoreTxt.setText(score);
			b.destroy();
			enemyBullets.splice(i, 1);
			if (playerLives <= 0) {
				LK.showGameOver();
				return;
			} else {
				// Respawn player
				player.destroy();
				spawnPlayer();
				return;
			}
		}
	}
	// Boss logic
	if (bossActive && boss) {
		boss.update();
		// Boss collision with player bullets
		for (var i = playerBullets.length - 1; i >= 0; i--) {
			var b = playerBullets[i];
			if (b.intersects(boss)) {
				b.destroy();
				playerBullets.splice(i, 1);
				boss.hp--;
				if (boss.hp <= 0) {
					boss.destroy();
					boss = null;
					bossActive = false;
					score += 5;
					scoreTxt.setText(score);
					break;
				}
			}
		}
		// Boss collision with player
		if (player && !player.invincible && boss && boss.intersects(player)) {
			LK.effects.flashScreen(0xff0000, 1000);
			playerLives--;
			livesTxt.setText('♥ x' + playerLives);
			if (playerLives <= 0) {
				LK.showGameOver();
				return;
			} else {
				player.destroy();
				spawnPlayer();
				return;
			}
		}
	}
	// Spawning logic
	if (LK.ticks % 60 === 0 && !bossActive) {
		spawnEnemy();
	}
};
// Start game
spawnPlayer();

===================================================================
--- original.js
+++ change.js
@@ -286,20 +286,8 @@
 					if (typeof spawnPowerup === "function") {
 						spawnPowerup(e.x, e.y);
 					}
 				}
-				// Powerup collision with player
-				if (typeof powerups !== "undefined") {
-					for (var k = powerups.length - 1; k >= 0; k--) {
-						var p = powerups[k];
-						if (player && p.intersects(player)) {
-							// Grant triple shot for 10 shots
-							player.tripleShot = 10;
-							p.destroy();
-							powerups.splice(k, 1);
-						}
-					}
-				}
 				score += 1;
 				scoreTxt.setText(score);
 				// Boss spawn check: every 30 points
 				if (score % 30 === 0 && score > 0) {
@@ -341,8 +329,20 @@
 				return;
 			}
 		}
 	}
+	// Powerup collision with player (player must collect the powerup)
+	if (typeof powerups !== "undefined") {
+		for (var k = powerups.length - 1; k >= 0; k--) {
+			var p = powerups[k];
+			if (player && p.intersects(player)) {
+				// Grant triple shot for 10 shots
+				player.tripleShot = 10;
+				p.destroy();
+				powerups.splice(k, 1);
+			}
+		}
+	}
 	// Update and remove enemy bullets
 	for (var i = enemyBullets.length - 1; i >= 0; i--) {
 		var b = enemyBullets[i];
 		b.update();