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

/**** 
* Classes
****/ 
// Boss
var Boss = Container.expand(function () {
	var self = Container.call(this);
	var boss = self.attachAsset('boss', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.maxHp = 10;
	self.hp = 10;
	self.shootCooldown = 0;
	self.patternTick = 0;
	self.patternType = 0;
	self.moveDir = 1;
	self.moveSpeed = 6;
	self.update = function () {
		// Boss movement: horizontal oscillation
		self.x += self.moveDir * self.moveSpeed;
		if (self.x < 320) {
			self.x = 320;
			self.moveDir = 1;
		}
		if (self.x > 2048 - 320) {
			self.x = 2048 - 320;
			self.moveDir = -1;
		}
		self.patternTick++;
	};
	return self;
});
// Boss bullet
var BossBullet = Container.expand(function () {
	var self = Container.call(this);
	var bullet = self.attachAsset('bossBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedY = 18;
	self.speedX = 0;
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
	return self;
});
// Heart
var Heart = Container.expand(function () {
	var self = Container.call(this);
	var heart = self.attachAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speedY = 12;
	self.update = function () {
		self.y += self.speedY;
	};
	return self;
});
// Player
var Player = Container.expand(function () {
	var self = Container.call(this);
	var player = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.cooldown = 0;
	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
	});
	// Calculate direction toward last tap
	var dx = lastTapX - player.x;
	var dy = lastTapY - (player.y - 100);
	var mag = Math.sqrt(dx * dx + dy * dy);
	// Defensive: if mag is 0, shoot straight up
	if (mag === 0) {
		dx = 0;
		dy = -1;
		mag = 1;
	}
	var speed = 36;
	self.speedX = dx / mag * speed;
	self.speedY = dy / mag * speed;
	self.update = function () {
		self.x += self.speedX;
		self.y += self.speedY;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181a1b
});

/**** 
* Game Code
****/ 
// Game state variables
// Player bullet
// Boss bullet
// Player
// Boss
// Boss HP bar
// Boss HP bar background
// Sound effects
// Music
var currentLevel = 1;
var maxLevel = 30;
var player, boss;
var playerBullets = [];
var bossBullets = [];
var canShoot = true;
var bossHpBar, bossHpBarBg, bossHpText;
var scoreText, levelText;
var isGameOver = false;
var isYouWin = false;
var lastPlayerHit = false;
var lastBossHit = false;
var playerInvulnTicks = 0;
// Hearts
var hearts = [];
var heartSpawnTimer = null;
// Store last tap position for bullet direction
var lastTapX = 2048 / 2;
var lastTapY = 600;
// Boss damage per level: first boss 10, +2 per level
function getBossDamage(level) {
	return 10 + (level - 1) * 2;
}
// Start music
LK.playMusic('bossMusic');
// --- UI ---
scoreText = new Text2('Score: 0', {
	size: 90,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
levelText = new Text2('Level 1', {
	size: 70,
	fill: 0xFFE066
});
levelText.anchor.set(0.5, 0);
LK.gui.top.addChild(levelText);
levelText.y = 110;
// Boss HP bar
bossHpBarBg = LK.getAsset('bossHpBarBg', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 2048 / 2,
	y: 320
});
bossHpBar = LK.getAsset('bossHpBar', {
	anchorX: 0,
	anchorY: 0.5,
	x: 2048 / 2 - 400,
	y: 320
});
bossHpText = new Text2('', {
	size: 60,
	fill: 0xFFFFFF
});
bossHpText.anchor.set(0.5, 0.5);
bossHpText.x = 2048 / 2;
bossHpText.y = 320;
game.addChild(bossHpBarBg);
game.addChild(bossHpBar);
game.addChild(bossHpText);
// --- Player ---
player = new Player();
player.x = 2048 / 2;
player.y = 2732 - 320;
player.hp = 100;
game.addChild(player);
// Player HP UI
var playerHpText = new Text2('HP: 100 / 100', {
	size: 80,
	fill: 0x4ec3ff
});
playerHpText.anchor.set(0.5, 0);
LK.gui.top.addChild(playerHpText);
playerHpText.y = 210;
// --- Boss ---
var bossShootTimer = null;
function spawnBoss(level) {
	if (boss) {
		boss.destroy();
	}
	boss = new Boss();
	boss.maxHp = 10 + (level - 1) * 8;
	boss.hp = boss.maxHp;
	boss.x = 2048 / 2;
	boss.y = 600;
	boss.moveSpeed = 6 + Math.floor(level / 2);
	boss.patternType = (level - 1) % 3;
	boss.shootCooldown = 0;
	boss.patternTick = 0;
	game.addChild(boss);
	updateBossHpBar();
	// Clear any previous boss shoot timer
	if (bossShootTimer !== null) {
		LK.clearInterval(bossShootTimer);
		bossShootTimer = null;
	}
	// Set up boss shooting every 2 seconds (2000ms)
	bossShootTimer = LK.setInterval(function () {
		if (!isGameOver && !isYouWin && boss) {
			// Always shoot a straight bullet for the timer event
			var bullet = new BossBullet();
			bullet.x = boss.x;
			bullet.y = boss.y + 120;
			bullet.speedY = 18 + currentLevel * 1.5;
			bullet.speedX = 0;
			bossBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('bossShoot').play();
		}
	}, 2000);
}
spawnBoss(currentLevel);
// --- Helper functions ---
function updateBossHpBar() {
	var hpRatio = boss.hp / boss.maxHp;
	bossHpBar.width = 800 * hpRatio;
	bossHpText.setText('Boss HP: ' + boss.hp + ' / ' + boss.maxHp);
}
function resetGameState() {
	// Remove all bullets
	for (var i = 0; i < playerBullets.length; i++) {
		playerBullets[i].destroy();
	}
	for (var i = 0; i < bossBullets.length; i++) {
		bossBullets[i].destroy();
	}
	playerBullets = [];
	bossBullets = [];
	player.x = 2048 / 2;
	player.y = 2732 - 320;
	player.hp = 100;
	playerHpText.setText('HP: 100 / 100');
	playerInvulnTicks = 0;
	lastPlayerHit = false;
	lastBossHit = false;
	isGameOver = false;
	isYouWin = false;
	canShoot = true;
	LK.setScore(0);
	scoreText.setText('Score: 0');
	currentLevel = 1;
	levelText.setText('Level 1');
	// Remove all hearts
	for (var i = 0; i < hearts.length; i++) {
		hearts[i].destroy();
	}
	hearts = [];
	// Clear heart spawn timer if exists
	if (typeof heartSpawnTimer !== "undefined" && heartSpawnTimer !== null) {
		LK.clearInterval(heartSpawnTimer);
		heartSpawnTimer = null;
	}
	// Clear boss shoot timer if exists
	if (typeof bossShootTimer !== "undefined" && bossShootTimer !== null) {
		LK.clearInterval(bossShootTimer);
		bossShootTimer = null;
	}
	spawnBoss(currentLevel);
	// Start heart spawn timer (every 7-12 seconds, random)
	heartSpawnTimer = LK.setInterval(function () {
		if (!isGameOver && !isYouWin) {
			var heart = new Heart();
			heart.x = 200 + Math.random() * (2048 - 400);
			heart.y = -80;
			hearts.push(heart);
			game.addChild(heart);
		}
	}, 7000 + Math.floor(Math.random() * 5000));
}
// --- Shooting ---
function shootPlayerBullet() {
	if (!canShoot || isGameOver || isYouWin) return;
	if (player.cooldown > 0) return;
	var bullet = new PlayerBullet();
	bullet.x = player.x;
	bullet.y = player.y - 100;
	playerBullets.push(bullet);
	game.addChild(bullet);
	player.cooldown = 10;
	LK.getSound('playerShoot').play();
}
function shootBossBullets() {
	if (!boss) return;
	var pattern = boss.patternType;
	var tick = boss.patternTick;
	var level = currentLevel;
	// Patterns: 0 = straight, 1 = spread, 2 = aimed
	if (pattern === 0) {
		// Straight down, faster at higher levels
		if (tick % Math.max(40 - level * 2, 12) === 0) {
			var bullet = new BossBullet();
			bullet.x = boss.x;
			bullet.y = boss.y + 120;
			bullet.speedY = 18 + level * 1.5;
			bullet.speedX = 0;
			bossBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('bossShoot').play();
		}
	} else if (pattern === 1) {
		// Spread: 3 bullets
		if (tick % Math.max(60 - level * 2, 18) === 0) {
			for (var i = -1; i <= 1; i++) {
				var bullet = new BossBullet();
				bullet.x = boss.x;
				bullet.y = boss.y + 120;
				bullet.speedY = 16 + level * 1.2;
				bullet.speedX = i * (6 + level * 0.7);
				bossBullets.push(bullet);
				game.addChild(bullet);
			}
			LK.getSound('bossShoot').play();
		}
	} else if (pattern === 2) {
		// Aimed at player
		if (tick % Math.max(50 - level * 2, 14) === 0) {
			var dx = player.x - boss.x;
			var dy = player.y - boss.y;
			var mag = Math.sqrt(dx * dx + dy * dy);
			var speed = 20 + level * 1.5;
			var bullet = new BossBullet();
			bullet.x = boss.x;
			bullet.y = boss.y + 120;
			bullet.speedX = dx / mag * speed;
			bullet.speedY = dy / mag * speed;
			bossBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('bossShoot').play();
		}
	}
}
// --- Game events ---
// Tap anywhere to shoot
game.down = function (x, y, obj) {
	// Store tap position for bullet direction
	lastTapX = x;
	lastTapY = y;
	shootPlayerBullet();
};
// No drag/move for player (player is stationary)
// --- Main update loop ---
game.update = function () {
	if (isGameOver || isYouWin) return;
	// Player cooldown
	if (player.cooldown > 0) player.cooldown--;
	// Player invulnerability after hit
	if (playerInvulnTicks > 0) {
		playerInvulnTicks--;
		if (playerInvulnTicks % 6 < 3) {
			player.alpha = 0.4;
		} else {
			player.alpha = 1;
		}
	} else {
		player.alpha = 1;
	}
	// Update boss
	if (boss) boss.update();
	// Boss shooting
	if (boss) shootBossBullets();
	// Update player bullets
	for (var i = playerBullets.length - 1; i >= 0; i--) {
		var b = playerBullets[i];
		b.update();
		// Off screen
		if (b.y < -100) {
			b.destroy();
			playerBullets.splice(i, 1);
			continue;
		}
		// Hit boss
		if (boss && b.intersects(boss)) {
			boss.hp -= 1;
			LK.getSound('bossHit').play();
			tween(boss, {
				scaleX: 1.2,
				scaleY: 1.2
			}, {
				duration: 80,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(boss, {
						scaleX: 1,
						scaleY: 1
					}, {
						duration: 80
					});
				}
			});
			updateBossHpBar();
			b.destroy();
			playerBullets.splice(i, 1);
			LK.setScore(LK.getScore() + 1);
			scoreText.setText('Score: ' + LK.getScore());
			// Boss defeated
			if (boss.hp <= 0) {
				LK.getSound('bossDefeat').play();
				tween(boss, {
					alpha: 0
				}, {
					duration: 400,
					onFinish: function onFinish() {
						boss.destroy();
					}
				});
				if (currentLevel < maxLevel) {
					currentLevel++;
					levelText.setText('Level ' + currentLevel);
					LK.setTimeout(function () {
						spawnBoss(currentLevel);
					}, 900);
				} else {
					// Win
					isYouWin = true;
					LK.showYouWin();
				}
			}
		}
	}
	// Update boss bullets
	for (var i = bossBullets.length - 1; i >= 0; i--) {
		var b = bossBullets[i];
		b.update();
		// Off screen
		if (b.y > 2732 + 100 || b.x < -100 || b.x > 2048 + 100) {
			b.destroy();
			bossBullets.splice(i, 1);
			continue;
		}
		// Hit player
		if (playerInvulnTicks === 0 && b.intersects(player)) {
			LK.getSound('playerHit').play();
			tween(player, {
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 80,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(player, {
						scaleX: 1,
						scaleY: 1
					}, {
						duration: 80
					});
				}
			});
			playerInvulnTicks = 60;
			// Decrease player HP by boss damage
			player.hp -= getBossDamage(currentLevel);
			if (player.hp < 0) player.hp = 0;
			// Update player HP UI
			playerHpText.setText('HP: ' + player.hp + ' / 100');
			// Game over if HP <= 0
			if (player.hp <= 0) {
				LK.effects.flashScreen(0xff0000, 800);
				isGameOver = true;
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 900);
			}
		}
	}
	// Update hearts
	for (var i = hearts.length - 1; i >= 0; i--) {
		var h = hearts[i];
		h.update();
		// Off screen
		if (h.y > 2732 + 100) {
			h.destroy();
			hearts.splice(i, 1);
			continue;
		}
		// Collect heart
		if (h.intersects(player)) {
			// Heal player by 50% of max (100), but not above 100
			var heal = Math.ceil(100 * 0.5);
			player.hp = Math.min(player.hp + heal, 100);
			playerHpText.setText('HP: ' + player.hp + ' / 100');
			h.destroy();
			hearts.splice(i, 1);
			// Optional: flash blue for heal
			LK.effects.flashObject(player, 0x4ec3ff, 400);
			continue;
		}
	}
};
// Reset game state on game over or win
LK.on('gameover', function () {
	// Clear boss shoot timer if exists
	if (typeof bossShootTimer !== "undefined" && bossShootTimer !== null) {
		LK.clearInterval(bossShootTimer);
		bossShootTimer = null;
	}
	// Clear heart spawn timer if exists
	if (typeof heartSpawnTimer !== "undefined" && heartSpawnTimer !== null) {
		LK.clearInterval(heartSpawnTimer);
		heartSpawnTimer = null;
	}
	resetGameState();
});
LK.on('youwin', function () {
	// Clear boss shoot timer if exists
	if (typeof bossShootTimer !== "undefined" && bossShootTimer !== null) {
		LK.clearInterval(bossShootTimer);
		bossShootTimer = null;
	}
	// Clear heart spawn timer if exists
	if (typeof heartSpawnTimer !== "undefined" && heartSpawnTimer !== null) {
		LK.clearInterval(heartSpawnTimer);
		heartSpawnTimer = null;
	}
	resetGameState();
});

===================================================================
--- original.js
+++ change.js
@@ -49,8 +49,21 @@
 		self.y += self.speedY;
 	};
 	return self;
 });
+// Heart
+var Heart = Container.expand(function () {
+	var self = Container.call(this);
+	var heart = self.attachAsset('heart', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speedY = 12;
+	self.update = function () {
+		self.y += self.speedY;
+	};
+	return self;
+});
 // Player
 var Player = Container.expand(function () {
 	var self = Container.call(this);
 	var player = self.attachAsset('player', {
@@ -118,8 +131,11 @@
 var isYouWin = false;
 var lastPlayerHit = false;
 var lastBossHit = false;
 var playerInvulnTicks = 0;
+// Hearts
+var hearts = [];
+var heartSpawnTimer = null;
 // Store last tap position for bullet direction
 var lastTapX = 2048 / 2;
 var lastTapY = 600;
 // Boss damage per level: first boss 10, +2 per level
@@ -246,14 +262,34 @@
 	LK.setScore(0);
 	scoreText.setText('Score: 0');
 	currentLevel = 1;
 	levelText.setText('Level 1');
+	// Remove all hearts
+	for (var i = 0; i < hearts.length; i++) {
+		hearts[i].destroy();
+	}
+	hearts = [];
+	// Clear heart spawn timer if exists
+	if (typeof heartSpawnTimer !== "undefined" && heartSpawnTimer !== null) {
+		LK.clearInterval(heartSpawnTimer);
+		heartSpawnTimer = null;
+	}
 	// Clear boss shoot timer if exists
 	if (typeof bossShootTimer !== "undefined" && bossShootTimer !== null) {
 		LK.clearInterval(bossShootTimer);
 		bossShootTimer = null;
 	}
 	spawnBoss(currentLevel);
+	// Start heart spawn timer (every 7-12 seconds, random)
+	heartSpawnTimer = LK.setInterval(function () {
+		if (!isGameOver && !isYouWin) {
+			var heart = new Heart();
+			heart.x = 200 + Math.random() * (2048 - 400);
+			heart.y = -80;
+			hearts.push(heart);
+			game.addChild(heart);
+		}
+	}, 7000 + Math.floor(Math.random() * 5000));
 }
 // --- Shooting ---
 function shootPlayerBullet() {
 	if (!canShoot || isGameOver || isYouWin) return;
@@ -447,22 +483,55 @@
 				}, 900);
 			}
 		}
 	}
+	// Update hearts
+	for (var i = hearts.length - 1; i >= 0; i--) {
+		var h = hearts[i];
+		h.update();
+		// Off screen
+		if (h.y > 2732 + 100) {
+			h.destroy();
+			hearts.splice(i, 1);
+			continue;
+		}
+		// Collect heart
+		if (h.intersects(player)) {
+			// Heal player by 50% of max (100), but not above 100
+			var heal = Math.ceil(100 * 0.5);
+			player.hp = Math.min(player.hp + heal, 100);
+			playerHpText.setText('HP: ' + player.hp + ' / 100');
+			h.destroy();
+			hearts.splice(i, 1);
+			// Optional: flash blue for heal
+			LK.effects.flashObject(player, 0x4ec3ff, 400);
+			continue;
+		}
+	}
 };
 // Reset game state on game over or win
 LK.on('gameover', function () {
 	// Clear boss shoot timer if exists
 	if (typeof bossShootTimer !== "undefined" && bossShootTimer !== null) {
 		LK.clearInterval(bossShootTimer);
 		bossShootTimer = null;
 	}
+	// Clear heart spawn timer if exists
+	if (typeof heartSpawnTimer !== "undefined" && heartSpawnTimer !== null) {
+		LK.clearInterval(heartSpawnTimer);
+		heartSpawnTimer = null;
+	}
 	resetGameState();
 });
 LK.on('youwin', function () {
 	// Clear boss shoot timer if exists
 	if (typeof bossShootTimer !== "undefined" && bossShootTimer !== null) {
 		LK.clearInterval(bossShootTimer);
 		bossShootTimer = null;
 	}
+	// Clear heart spawn timer if exists
+	if (typeof heartSpawnTimer !== "undefined" && heartSpawnTimer !== null) {
+		LK.clearInterval(heartSpawnTimer);
+		heartSpawnTimer = null;
+	}
 	resetGameState();
 });
\ No newline at end of file