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

/**** 
* Classes
****/ 
var AmmoBox = Container.expand(function () {
	var self = Container.call(this);
	var ammoGraphics = self.attachAsset('ammoBox', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.ammoAmount = 50;
	self.spawnTime = LK.ticks;
	self.lifespan = 600; // 10 seconds at 60fps
	self.update = function () {
		self.rotation += 0.02;
	};
	return self;
});
var AmmoPowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerUpGraphics = self.attachAsset('ammoPowerUp', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.ammoAmount = 10;
	self.spawnTime = LK.ticks;
	self.lifespan = 600; // 10 seconds at 60fps
	self.update = function () {
		self.rotation += 0.02;
		// Add pulsing effect
		self.scaleX = 1 + Math.sin(LK.ticks * 0.1) * 0.1;
		self.scaleY = 1 + Math.sin(LK.ticks * 0.1) * 0.1;
	};
	return self;
});
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 20;
	self.damage = 10;
	self.vx = 0;
	self.vy = 0;
	self.piercing = false;
	self.killHit = false;
	self.maxDistance = 800;
	self.travelDistance = 0;
	self.update = function () {
		var moveX = self.vx;
		var moveY = self.vy;
		var distance = Math.sqrt(moveX * moveX + moveY * moveY);
		self.travelDistance += distance;
		self.x += moveX;
		self.y += moveY;
	};
	return self;
});
var HealthPack = Container.expand(function () {
	var self = Container.call(this);
	var healthGraphics = self.attachAsset('healthPack', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.healAmount = 30;
	self.spawnTime = LK.ticks;
	self.lifespan = 600; // 10 seconds at 60fps
	self.update = function () {
		self.rotation += 0.02;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 100;
	self.maxHealth = 100;
	self.fireRate = 10;
	self.fireCooldown = 0;
	self.moveSpeed = 5;
	self.invulnerable = 0;
	self.takeDamage = function (amount) {
		if (self.invulnerable > 0) return;
		self.health -= amount;
		self.invulnerable = 60;
		LK.getSound('playerHurt').play();
		LK.effects.flashObject(self, 0xFF0000, 500);
		if (self.health <= 0) {
			self.health = 0;
			return true;
		}
		return false;
	};
	self.heal = function (amount) {
		self.health = Math.min(self.health + amount, self.maxHealth);
	};
	self.update = function () {
		if (self.fireCooldown > 0) self.fireCooldown--;
		if (self.invulnerable > 0) {
			self.invulnerable--;
			self.alpha = Math.floor(self.invulnerable / 5) % 2 ? 0.5 : 1;
		}
	};
	return self;
});
var TripleShot = Container.expand(function () {
	var self = Container.call(this);
	var tripleShotGraphics = self.attachAsset('tripleShot', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.spawnTime = LK.ticks;
	self.lifespan = 600; // 10 seconds at 60fps
	self.update = function () {
		self.rotation += 0.02;
		// Add pulsing effect
		self.scaleX = 1 + Math.sin(LK.ticks * 0.1) * 0.1;
		self.scaleY = 1 + Math.sin(LK.ticks * 0.1) * 0.1;
	};
	return self;
});
var Zoin = Container.expand(function () {
	var self = Container.call(this);
	var zoinGraphics = self.attachAsset('zoin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.spawnTime = LK.ticks;
	self.lifespan = 600; // 10 seconds at 60fps
	self.update = function () {
		self.rotation += 0.05;
		// Add floating effect
		self.y += Math.sin(LK.ticks * 0.1) * 0.3;
	};
	return self;
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.attachAsset('zombie', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.baseSpeed = 1.5;
	var variation = self.baseSpeed * 0.25; // 25% variation
	self.speed = self.baseSpeed + (Math.random() - 0.5) * 2 * variation; // Random between baseSpeed ± 25%
	self.health = 20;
	self.maxHealth = 20; // Store base health for wave scaling
	self.damage = 1;
	self.baseDamage = 1; // Store base damage for wave scaling
	self.attackCooldown = 0;
	self.isDead = false;
	self.takeDamage = function (amount) {
		if (self.isDead) return false;
		self.health -= amount;
		if (self.health <= 0) {
			self.isDead = true;
			LK.getSound('zombieHit').play();
			return true;
		}
		zombieGraphics.tint = 0xFF0000;
		tween(zombieGraphics, {
			tint: 0xFFFFFF
		}, {
			duration: 200,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				zombieGraphics.tint = 0xFFFFFF;
			}
		});
		return false;
	};
	self.update = function () {
		if (self.isDead) return;
		if (self.attackCooldown > 0) self.attackCooldown--;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
var player;
var zombies = [];
var bullets = [];
var pickups = [];
var wave = 1;
var zombiesPerWave = 5;
var zombiesSpawned = 0;
var zombiesKilled = 0;
var spawnTimer = 0;
var scoreMultiplier = 1;
var killStreak = 0;
var powerAmmo = 0;
var lastPowerUpSpawn = 0;
var killsSinceLastPowerUp = 0;
var powerUpList = ['ammoPowerUp', 'healthPack', 'ammoBox', 'tripleShot'];
var lastPowerUpType = null;
var hasTripleShot = false;
var tripleShotLevel = 0;
var maxTripleShotLevel = 5;
var noZombiesTimer = 0;
var noZombiesThreshold = 600; // 10 seconds at 60fps
// Load persistent data from storage (removed reset statements)
// Load persistent data from storage without clearing
var zoins = storage.zoins || 0;
// Upgrade costs and levels - loaded from storage
var maxHealthUpgrades = storage.maxHealthUpgrades || 0;
var fireRateUpgrades = storage.fireRateUpgrades || 0;
var damageUpgrades = storage.damageUpgrades || 0;
// Save damage upgrades to storage whenever modified
storage.damageUpgrades = damageUpgrades;
// Load leaderboard data from storage
// Leaderboard data
var leaderboard = storage.leaderboard || [];
var currentPlayerName = '';
var moveControl;
var moveStick;
var isDraggingMove = false;
// UI Elements
var waveText = new Text2('Wave: 1', {
	size: 80,
	fill: 0xFFFFFF
});
waveText.anchor.set(0, 0);
waveText.x = 150;
LK.gui.topLeft.addChild(waveText);
var scoreText = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(1, 0);
scoreText.x = -150;
LK.gui.topRight.addChild(scoreText);
// Health bar black outline
var healthBarOutline = LK.getAsset('ammoBox', {
	width: 1849,
	height: 81,
	anchorX: 0.5,
	anchorY: 0
});
healthBarOutline.tint = 0x000000;
healthBarOutline.x = 1024;
healthBarOutline.y = 97;
game.addChildAt(healthBarOutline, 0);
// Health bar background
var healthBarBg = LK.getAsset('ammoBox', {
	width: 1843,
	height: 75,
	anchorX: 0.5,
	anchorY: 0
});
healthBarBg.tint = 0xFF0000;
healthBarBg.x = 1024;
healthBarBg.y = 100;
game.addChildAt(healthBarBg, 1);
// Health bar fill
var healthBarFill = LK.getAsset('ammoBox', {
	width: 1843,
	height: 75,
	anchorX: 0.5,
	anchorY: 0
});
healthBarFill.tint = 0x444444;
healthBarFill.x = 1024;
healthBarFill.y = 100;
game.addChildAt(healthBarFill, 2);
// Health text display
var healthText = new Text2('100/100', {
	size: 56,
	fill: 0xFFFFFF
});
healthText.anchor.set(0.5, 0.5);
healthText.x = 1024;
healthText.y = 137.5; // Center of health bar (100 + 75/2)
game.addChildAt(healthText, 3);
var powerAmmoText = new Text2('Power Ammo: 0', {
	size: 45,
	fill: 0xFFD700
});
powerAmmoText.anchor.set(1, 1);
powerAmmoText.x = -20;
powerAmmoText.y = -80;
LK.gui.bottomRight.addChild(powerAmmoText);
var zoinText = new Text2('Zoins: ' + zoins, {
	size: 45,
	fill: 0xFFD700
});
zoinText.anchor.set(1, 1);
zoinText.x = -20;
zoinText.y = -140;
LK.gui.bottomRight.addChild(zoinText);
// Leaderboard display as scrolling banner
var leaderboardText = new Text2('LEADERBOARD\n', {
	size: 40,
	fill: 0xFFFFFF
});
leaderboardText.anchor.set(0, 0);
leaderboardText.x = 2048; // Start off-screen to the right
leaderboardText.y = 200;
game.addChild(leaderboardText);
// Leaderboard scrolling variables
var leaderboardScrolling = false;
// Update leaderboard display
function updateLeaderboardDisplay() {
	var displayText = 'LEADERBOARD  ';
	var sortedLeaderboard = leaderboard.slice().sort(function (a, b) {
		return b.score - a.score;
	});
	// Show top 9 entries
	for (var i = 0; i < Math.min(9, sortedLeaderboard.length); i++) {
		var entry = sortedLeaderboard[i];
		displayText += i + 1 + '. ' + entry.name + ' - ' + entry.score + ' (Wave ' + entry.wave + ')  •  ';
	}
	// Find current player's best entry and position
	var playerBestEntry = null;
	var playerPosition = -1;
	for (var i = 0; i < sortedLeaderboard.length; i++) {
		var entry = sortedLeaderboard[i];
		if (entry.name === currentPlayerName && (!playerBestEntry || entry.score > playerBestEntry.score)) {
			playerBestEntry = entry;
			playerPosition = i + 1;
		}
	}
	// If player has an entry and it's not in top 9, show their position
	if (playerBestEntry && playerPosition > 9) {
		displayText += '... ' + playerPosition + '. ' + playerBestEntry.name + ' - ' + playerBestEntry.score + ' (Wave ' + playerBestEntry.wave + ')  •  ';
	}
	leaderboardText.setText(displayText);
	startLeaderboardScroll();
}
// Start leaderboard scrolling animation
function startLeaderboardScroll() {
	if (leaderboardScrolling) return;
	leaderboardScrolling = true;
	// Stop any existing tween
	tween.stop(leaderboardText, {
		x: true
	});
	// Reset position to start from right
	leaderboardText.x = 2048;
	// Calculate scroll distance based on text width
	var scrollDistance = leaderboardText.width + 2048;
	// Start scrolling animation
	tween(leaderboardText, {
		x: -scrollDistance
	}, {
		duration: scrollDistance * 15,
		// Adjust speed as needed
		easing: tween.linear,
		onFinish: function onFinish() {
			leaderboardScrolling = false;
			// Restart the scroll after a brief pause
			LK.setTimeout(function () {
				startLeaderboardScroll();
			}, 2000);
		}
	});
}
updateLeaderboardDisplay();
// Function to submit score to leaderboard
function submitScoreToLeaderboard() {
	// Generate a simple player name if none exists
	if (!currentPlayerName) {
		currentPlayerName = 'Player' + Math.floor(Math.random() * 1000);
	}
	// Create simple literal object for leaderboard entry
	var newEntry = {
		name: currentPlayerName,
		score: LK.getScore(),
		wave: wave
	};
	// Add to leaderboard
	leaderboard.push(newEntry);
	// Keep only top 20 scores
	leaderboard.sort(function (a, b) {
		return b.score - a.score;
	});
	if (leaderboard.length > 20) {
		leaderboard = leaderboard.slice(0, 20);
	}
	// Save cleaned leaderboard to storage
	var cleanLeaderboard = [];
	for (var i = 0; i < leaderboard.length; i++) {
		var entry = leaderboard[i];
		cleanLeaderboard.push({
			name: String(entry.name),
			score: Number(entry.score),
			wave: Number(entry.wave)
		});
	}
	storage.leaderboard = cleanLeaderboard;
	// Update display
	updateLeaderboardDisplay();
}
// Initialize player
player = game.addChild(new Player());
player.maxHealth = (maxHealthUpgrades + 1) * 2;
player.health = player.maxHealth;
player.fireRate = 3 * Math.pow(1.1, fireRateUpgrades);
player.x = 1024;
player.y = 1366;
// Initialize controls
moveControl = LK.getAsset('moveControl', {
	anchorX: 0.5,
	anchorY: 0.5,
	alpha: 0
});
moveControl.x = 300;
moveControl.y = 2432;
game.addChild(moveControl);
moveStick = LK.getAsset('moveControl', {
	anchorX: 0.5,
	anchorY: 0.5,
	scaleX: 0.3,
	scaleY: 0.3,
	alpha: 0
});
moveStick.x = moveControl.x;
moveStick.y = moveControl.y;
game.addChild(moveStick);
// Aim control removed - using automatic targeting
// Helper functions
function calculateCumulativeCost(upgradeLevel) {
	var totalCost = 0;
	for (var i = 0; i <= upgradeLevel; i++) {
		totalCost += Math.round((10 + i * 2) / 2);
	}
	return totalCost;
}
function resetGame() {
	// Reset wave and zombies
	wave = 1;
	zombiesPerWave = 5;
	zombiesSpawned = 0;
	zombiesKilled = 0;
	spawnTimer = 0;
	// Reset score and multipliers
	LK.setScore(0);
	scoreMultiplier = 1;
	killStreak = 0;
	killsSinceLastPowerUp = 0;
	lastPowerUpSpawn = 0;
	lastPowerUpType = null;
	// Reset powerups
	powerAmmo = 0;
	hasTripleShot = false;
	tripleShotLevel = 0;
	// Reset player state with upgrades
	player.maxHealth = (maxHealthUpgrades + 1) * 2;
	player.health = player.maxHealth;
	player.fireRate = 3 * Math.pow(1.1, fireRateUpgrades);
	player.fireCooldown = 0;
	player.invulnerable = 0;
	player.alpha = 1;
	// Clear all game objects
	for (var i = zombies.length - 1; i >= 0; i--) {
		zombies[i].destroy();
	}
	zombies = [];
	for (var i = bullets.length - 1; i >= 0; i--) {
		bullets[i].destroy();
	}
	bullets = [];
	for (var i = pickups.length - 1; i >= 0; i--) {
		pickups[i].destroy();
	}
	pickups = [];
	// Update UI
	waveText.setText('Wave: ' + wave);
	scoreText.setText('Score: ' + LK.getScore());
	// Update health bar
	var healthPercent = player.health / player.maxHealth;
	healthBarFill.width = 1843 * healthPercent;
	healthText.setText(player.health + '/' + player.maxHealth);
	powerAmmoText.setText('Power Ammo: ' + powerAmmo);
	powerAmmoText.visible = false;
	// Reset player position
	player.x = 1024;
	player.y = 1366;
	// Reset no zombies timer
	noZombiesTimer = 0;
}
function spawnZombie() {
	var zombie = new Zombie();
	var side = Math.floor(Math.random() * 4);
	switch (side) {
		case 0:
			// Top
			zombie.x = Math.random() * 2048;
			zombie.y = -50;
			break;
		case 1:
			// Right
			zombie.x = 2098;
			zombie.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom
			zombie.x = Math.random() * 2048;
			zombie.y = 2782;
			break;
		case 3:
			// Left
			zombie.x = -50;
			zombie.y = Math.random() * 2732;
			break;
	}
	zombie.speed = zombie.baseSpeed * (1 + wave * 0.1) + (Math.random() - 0.5) * 2 * (zombie.baseSpeed * 0.25);
	zombie.health += wave * 5;
	zombie.damage += Math.floor(wave * 2); // Increase damage by 2 per wave
	zombie.scaleX = 0;
	zombie.scaleY = 0;
	zombie.alpha = 0;
	zombies.push(zombie);
	game.addChild(zombie);
	zombiesSpawned++;
	// Animate zombie spawn
	tween(zombie, {
		scaleX: 1,
		scaleY: 1,
		alpha: 1
	}, {
		duration: 300,
		easing: tween.easeOut
	});
}
function spawnPickup(x, y) {
	var shouldSpawn = false;
	var pickup;
	var powerUpType;
	// Force powerup spawn if 50+ kills without powerup
	if (killsSinceLastPowerUp >= 50) {
		shouldSpawn = true;
		// Create available powerup list excluding last spawned type
		var availablePowerUps = powerUpList.slice();
		if (lastPowerUpType !== null) {
			var index = availablePowerUps.indexOf(lastPowerUpType);
			if (index > -1) {
				availablePowerUps.splice(index, 1);
			}
		}
		powerUpType = availablePowerUps[Math.floor(Math.random() * availablePowerUps.length)];
		if (powerUpType === 'ammoPowerUp') {
			pickup = new AmmoPowerUp();
		} else if (powerUpType === 'ammoBox') {
			pickup = new AmmoBox();
		} else if (powerUpType === 'tripleShot') {
			pickup = new TripleShot();
		} else {
			pickup = new HealthPack();
		}
		lastPowerUpType = powerUpType;
		killsSinceLastPowerUp = 0;
		if (pickup instanceof AmmoPowerUp) {
			lastPowerUpSpawn = LK.ticks;
		}
	} else if (Math.random() < 0.3) {
		shouldSpawn = true;
		var rand = Math.random();
		if (rand < 0.1 && LK.ticks - lastPowerUpSpawn > 1800) {
			pickup = new AmmoPowerUp();
			powerUpType = 'ammoPowerUp';
			lastPowerUpSpawn = LK.ticks;
			killsSinceLastPowerUp = 0;
		} else if (rand < 0.15 && LK.ticks - lastPowerUpSpawn > 1800) {
			pickup = new TripleShot();
			powerUpType = 'tripleShot';
			lastPowerUpSpawn = LK.ticks;
			killsSinceLastPowerUp = 0;
		} else if (rand < 0.6) {
			pickup = new AmmoBox();
			powerUpType = 'ammoBox';
		} else {
			pickup = new HealthPack();
			powerUpType = 'healthPack';
		}
		lastPowerUpType = powerUpType;
	}
	if (shouldSpawn) {
		pickup.x = x;
		pickup.y = y;
		pickup.scaleX = 0;
		pickup.scaleY = 0;
		pickups.push(pickup);
		game.addChild(pickup);
		// Animate pickup spawn with bounce effect
		tween(pickup, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 400,
			easing: tween.elasticOut
		});
	}
}
function fireBullet() {
	// Convert shots per second to ticks between shots (60 ticks = 1 second)
	var shotsPerSecond = powerAmmo > 0 ? player.fireRate * 0.25 : player.fireRate; // Power ammo shoots at 25% of normal rate
	var ticksBetweenShots = Math.max(1, Math.floor(60 / shotsPerSecond)); // Ensure at least 1 tick between shots
	if (player.fireCooldown > 0) return;
	// Find closest zombie in range
	var closestZombie = null;
	var closestDistance = 500; // Maximum firing range
	for (var i = 0; i < zombies.length; i++) {
		var zombie = zombies[i];
		if (!zombie || zombie.isDead) continue;
		var dx = zombie.x - player.x;
		var dy = zombie.y - player.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < closestDistance) {
			closestDistance = distance;
			closestZombie = zombie;
		}
	}
	// Only fire if there's a zombie in range
	if (!closestZombie) return;
	var dx = closestZombie.x - player.x;
	var dy = closestZombie.y - player.y;
	var angle = Math.atan2(dy, dx);
	player.rotation = angle; // Rotate player to face target
	// Create bullets based on triple shot level
	var bulletCount = hasTripleShot ? 1 + tripleShotLevel * 2 : 1;
	var angleOffsets = [0]; // Always include center bullet
	if (hasTripleShot) {
		// Add bullets in pairs at increasing angles
		for (var level = 1; level <= tripleShotLevel; level++) {
			var angleOffset = level * 10 * Math.PI / 180;
			angleOffsets.push(-angleOffset); // Left bullet
			angleOffsets.push(angleOffset); // Right bullet
		}
	}
	for (var b = 0; b < bulletCount; b++) {
		var bullet = new Bullet();
		bullet.x = player.x;
		bullet.y = player.y;
		bullet.damage = 10 + damageUpgrades * 5;
		var bulletAngle = angle + angleOffsets[b];
		bullet.vx = Math.cos(bulletAngle) * bullet.speed;
		bullet.vy = Math.sin(bulletAngle) * bullet.speed;
		bullet.rotation = bulletAngle;
		if (powerAmmo > 0) {
			bullet.piercing = true;
			bullet.maxDistance = 1600; // 2x distance
			bullet.damage = (10 + damageUpgrades * 5) * 5; // 5x normal damage
			if (b === 0) powerAmmo--; // Only consume one power ammo per shot
			// Visual effect for power bullet
			tween(bullet, {
				scaleX: 1.5,
				scaleY: 1.5
			}, {
				duration: 100
			});
			bullet.tint = 0xFFD700;
		} else {
			bullet.maxDistance = 800;
		}
		bullets.push(bullet);
		game.addChild(bullet);
	}
	player.fireCooldown = ticksBetweenShots;
	LK.getSound('shoot').play();
}
;
// Event handlers
game.down = function (x, y, obj) {
	// Prevent control stick activation in bottom 1/4 of viewport (below y = 2049)
	if (y > 2049) return;
	isDraggingMove = true;
	// Move moveControl to click position
	moveControl.x = x;
	moveControl.y = y;
	// Move moveStick to the same position (center of control)
	moveStick.x = x;
	moveStick.y = y;
	// Show control stick with smooth animation
	tween(moveControl, {
		alpha: 0.3
	}, {
		duration: 200,
		easing: tween.easeOut
	});
	tween(moveStick, {
		alpha: 0.6
	}, {
		duration: 200,
		easing: tween.easeOut
	});
};
game.move = function (x, y, obj) {
	if (isDraggingMove) {
		moveStick.x = Math.max(moveControl.x - 150, Math.min(moveControl.x + 150, x));
		moveStick.y = Math.max(moveControl.y - 150, Math.min(moveControl.y + 150, y));
	}
};
game.up = function (x, y, obj) {
	if (isDraggingMove) {
		isDraggingMove = false;
		moveStick.x = moveControl.x;
		moveStick.y = moveControl.y;
		// Hide control stick with smooth animation
		tween(moveControl, {
			alpha: 0
		}, {
			duration: 150,
			easing: tween.easeIn
		});
		tween(moveStick, {
			alpha: 0
		}, {
			duration: 150,
			easing: tween.easeIn
		});
	}
};
// Main game loop
game.update = function () {
	// Player movement
	if (isDraggingMove) {
		var moveX = (moveStick.x - moveControl.x) / 150;
		var moveY = (moveStick.y - moveControl.y) / 150;
		player.x += moveX * player.moveSpeed;
		player.y += moveY * player.moveSpeed;
		player.x = Math.max(40, Math.min(2008, player.x));
		player.y = Math.max(40, Math.min(2692, player.y));
	}
	// Auto-fire (fireBullet now handles range checking internally)
	fireBullet();
	// Spawn zombies
	if (zombiesSpawned < zombiesPerWave) {
		spawnTimer++;
		if (spawnTimer > 60) {
			spawnZombie();
			spawnTimer = 0;
		}
	} else if (zombies.length === 0) {
		// Force spawn a powerup if none spawned this wave
		var powerupSpawnedThisWave = false;
		for (var p = 0; p < pickups.length; p++) {
			var pickup = pickups[p];
			if (pickup instanceof AmmoPowerUp || pickup instanceof HealthPack || pickup instanceof AmmoBox || pickup instanceof TripleShot) {
				powerupSpawnedThisWave = true;
				break;
			}
		}
		if (!powerupSpawnedThisWave) {
			// Spawn a guaranteed powerup at a random location near the center
			var guaranteedX = 1024 + (Math.random() - 0.5) * 800;
			var guaranteedY = 1366 + (Math.random() - 0.5) * 800;
			spawnPickup(guaranteedX, guaranteedY);
		}
		// Next wave
		wave++;
		zombiesPerWave = Math.min(5 + wave * 2, 30); // Cap at 30 zombies per wave to prevent performance issues
		zombiesSpawned = 0;
		zombiesKilled = 0;
		spawnTimer = 0; // Reset spawn timer for new wave
		noZombiesTimer = 0; // Reset no zombies timer
		waveText.setText('Wave: ' + wave);
	} else {
		// Check if there are zombies in view area (within screen bounds plus margin)
		var zombiesInView = false;
		for (var z = 0; z < zombies.length; z++) {
			var zombie = zombies[z];
			if (!zombie || zombie.isDead) continue;
			// Check if zombie is within view area (screen bounds + 200px margin)
			if (zombie.x >= -200 && zombie.x <= 2248 && zombie.y >= -200 && zombie.y <= 2932) {
				zombiesInView = true;
				break;
			}
		}
		// If no zombies in view, increment timer
		if (!zombiesInView && zombiesSpawned >= zombiesPerWave) {
			noZombiesTimer++;
			// If 10 seconds have passed without zombies in view, advance to next wave
			if (noZombiesTimer >= noZombiesThreshold) {
				// Remove all remaining zombies
				for (var i = zombies.length - 1; i >= 0; i--) {
					zombies[i].destroy();
					zombies.splice(i, 1);
				}
				// Force spawn a powerup if none spawned this wave
				var powerupSpawnedThisWave = false;
				for (var p = 0; p < pickups.length; p++) {
					var pickup = pickups[p];
					if (pickup instanceof AmmoPowerUp || pickup instanceof HealthPack || pickup instanceof AmmoBox || pickup instanceof TripleShot) {
						powerupSpawnedThisWave = true;
						break;
					}
				}
				if (!powerupSpawnedThisWave) {
					// Spawn a guaranteed powerup at a random location near the center
					var guaranteedX = 1024 + (Math.random() - 0.5) * 800;
					var guaranteedY = 1366 + (Math.random() - 0.5) * 800;
					spawnPickup(guaranteedX, guaranteedY);
				}
				// Next wave
				wave++;
				zombiesPerWave = Math.min(5 + wave * 2, 30); // Cap at 30 zombies per wave to prevent performance issues
				zombiesSpawned = 0;
				zombiesKilled = 0;
				spawnTimer = 0; // Reset spawn timer for new wave
				noZombiesTimer = 0; // Reset no zombies timer
				waveText.setText('Wave: ' + wave);
			}
		} else {
			// Reset timer if zombies are in view or we haven't spawned all zombies yet
			noZombiesTimer = 0;
		}
	}
	// Update zombies
	for (var i = zombies.length - 1; i >= 0; i--) {
		var zombie = zombies[i];
		// Skip if zombie is undefined or dead
		if (!zombie || zombie.isDead) continue;
		// Move towards player
		var dx = player.x - zombie.x;
		var dy = player.y - zombie.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 0) {
			zombie.x += dx / dist * zombie.speed;
			zombie.y += dy / dist * zombie.speed;
			zombie.rotation = Math.atan2(dy, dx);
		}
		// Check collision with player
		if (zombie.intersects(player) && zombie.attackCooldown === 0) {
			if (player.takeDamage(zombie.damage)) {
				// Submit score to leaderboard before game over
				submitScoreToLeaderboard();
				LK.showGameOver();
				return; // Exit game loop immediately when player dies
			}
			zombie.attackCooldown = 60;
			killStreak = 0;
			scoreMultiplier = 1;
		}
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		// Check if bullet is off screen or traveled max distance
		if (bullet.x < -50 || bullet.x > 2098 || bullet.y < -50 || bullet.y > 2782 || bullet.travelDistance > bullet.maxDistance) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check collision with zombies
		var bulletDestroyed = false;
		for (var j = zombies.length - 1; j >= 0; j--) {
			var zombie = zombies[j];
			if (!zombie || zombie.isDead) continue;
			if (bullet.intersects(zombie)) {
				if (zombie.takeDamage(bullet.damage)) {
					// Zombie died - add death animation
					spawnPickup(zombie.x, zombie.y);
					// Always drop 1 zoin when zombie dies
					var zoin = new Zoin();
					zoin.x = zombie.x;
					zoin.y = zombie.y;
					zoin.scaleX = 0;
					zoin.scaleY = 0;
					pickups.push(zoin);
					game.addChild(zoin);
					// Animate zoin spawn
					tween(zoin, {
						scaleX: 1,
						scaleY: 1
					}, {
						duration: 300,
						easing: tween.easeOut
					});
					var zombieToRemove = zombie; // Capture zombie reference for closure
					var zombieIndex = j; // Capture index for closure
					tween(zombie, {
						scaleX: 0,
						scaleY: 0,
						alpha: 0,
						rotation: zombie.rotation + Math.PI
					}, {
						duration: 300,
						easing: tween.easeIn,
						onFinish: function onFinish() {
							zombieToRemove.destroy();
							// Remove from zombies array after animation
							var currentIndex = zombies.indexOf(zombieToRemove);
							if (currentIndex !== -1) {
								zombies.splice(currentIndex, 1);
							}
						}
					});
					zombiesKilled++;
					killStreak++;
					killsSinceLastPowerUp++;
					if (killStreak % 5 === 0) {
						scoreMultiplier = Math.min(scoreMultiplier + 1, 5);
					}
					LK.setScore(LK.getScore() + 10 * scoreMultiplier);
					scoreText.setText('Score: ' + LK.getScore());
				}
				if (!bullet.piercing) {
					bullet.destroy();
					bullets.splice(i, 1);
					bulletDestroyed = true;
					break;
				}
			}
		}
		if (bulletDestroyed) continue;
	}
	// Update pickups
	for (var i = pickups.length - 1; i >= 0; i--) {
		var pickup = pickups[i];
		// Check if pickup has expired (10 seconds) - auto pickup regardless of distance
		var age = LK.ticks - pickup.spawnTime;
		if (age >= pickup.lifespan) {
			// Auto pickup all items when expiring
			if (pickup instanceof HealthPack) {
				player.heal(pickup.healAmount);
			} else if (pickup instanceof AmmoBox) {
				powerAmmo += pickup.ammoAmount;
				LK.effects.flashObject(player, 0x228b22, 500);
			} else if (pickup instanceof AmmoPowerUp) {
				powerAmmo += pickup.ammoAmount;
				LK.effects.flashObject(player, 0xFFD700, 500);
			} else if (pickup instanceof TripleShot) {
				if (!hasTripleShot) {
					hasTripleShot = true;
					tripleShotLevel = 1;
				} else if (tripleShotLevel < maxTripleShotLevel) {
					tripleShotLevel++;
				}
				LK.effects.flashObject(player, 0x00FF00, 500);
			} else if (pickup instanceof Zoin) {
				zoins++;
				storage.zoins = zoins; // Persist zoin count
				zoinText.setText('Zoins: ' + zoins);
				LK.effects.flashObject(player, 0xFFD700, 300);
			}
			LK.getSound('pickup').play();
			// Animate pickup collection
			tween(pickup, {
				scaleX: 2,
				scaleY: 2,
				alpha: 0
			}, {
				duration: 200,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					pickup.destroy();
				}
			});
			pickups.splice(i, 1);
			continue;
		}
		// Manual pickup when touching
		if (pickup.intersects(player)) {
			if (pickup instanceof HealthPack) {
				player.heal(pickup.healAmount);
			} else if (pickup instanceof AmmoBox) {
				powerAmmo += pickup.ammoAmount;
				LK.effects.flashObject(player, 0x228b22, 500);
			} else if (pickup instanceof AmmoPowerUp) {
				powerAmmo += pickup.ammoAmount;
				LK.effects.flashObject(player, 0xFFD700, 500);
			} else if (pickup instanceof TripleShot) {
				if (!hasTripleShot) {
					hasTripleShot = true;
					tripleShotLevel = 1;
				} else if (tripleShotLevel < maxTripleShotLevel) {
					tripleShotLevel++;
				}
				LK.effects.flashObject(player, 0x00FF00, 500);
			} else if (pickup instanceof Zoin) {
				zoins++;
				storage.zoins = zoins; // Persist zoin count
				zoinText.setText('Zoins: ' + zoins);
				LK.effects.flashObject(player, 0xFFD700, 300);
			}
			LK.getSound('pickup').play();
			// Animate pickup collection
			tween(pickup, {
				scaleX: 2,
				scaleY: 2,
				alpha: 0
			}, {
				duration: 200,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					pickup.destroy();
				}
			});
			pickups.splice(i, 1);
		}
	}
	// Update UI
	// Update health bar
	var healthPercent = player.health / player.maxHealth;
	healthBarFill.width = 1843 * healthPercent;
	healthText.setText(player.health + '/' + player.maxHealth);
	powerAmmoText.setText('Power Ammo: ' + powerAmmo);
	// Hide/show power ammo counter based on availability
	powerAmmoText.visible = powerAmmo > 0;
	// Update button state based on zoin availability
	var currentPrice = calculateCumulativeCost(maxHealthUpgrades);
	if (zoins < currentPrice) {
		bottomLeftButton.alpha = 0.5; // Dim button when unaffordable
		lifeLabel.alpha = 0.5;
		priceLabel.alpha = 0.5;
	} else {
		bottomLeftButton.alpha = 1.0; // Full opacity when affordable
		lifeLabel.alpha = 1.0;
		priceLabel.alpha = 1.0;
	}
	// Update fire rate button state based on zoin availability
	var fireRateCurrentPrice = calculateCumulativeCost(fireRateUpgrades);
	if (zoins < fireRateCurrentPrice) {
		secondButton.alpha = 0.5; // Dim button when unaffordable
		fireRateLabel.alpha = 0.5;
		fireRatePriceLabel.alpha = 0.5;
	} else {
		secondButton.alpha = 1.0; // Full opacity when affordable
		fireRateLabel.alpha = 1.0;
		fireRatePriceLabel.alpha = 1.0;
	}
	// Despawn distant pickups
	for (var i = pickups.length - 1; i >= 0; i--) {
		var pickup = pickups[i];
		var dx = player.x - pickup.x;
		var dy = player.y - pickup.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist > 2000) {
			pickup.destroy();
			pickups.splice(i, 1);
		}
	}
};
// Create bottom left button
var bottomLeftButton = LK.getAsset('ammoBox', {
	width: 250,
	height: 100,
	anchorX: 0,
	anchorY: 1
});
bottomLeftButton.tint = 0xFF0000; // Red background
bottomLeftButton.x = 20;
bottomLeftButton.y = -20;
LK.gui.bottomLeft.addChild(bottomLeftButton);
// Create black outline for button
var buttonOutline = LK.getAsset('ammoBox', {
	width: 256,
	height: 106,
	anchorX: 0,
	anchorY: 1
});
buttonOutline.tint = 0x000000; // Black outline
buttonOutline.x = 17;
buttonOutline.y = -17;
LK.gui.bottomLeft.addChildAt(buttonOutline, 0); // Add behind the button
// Create LIFE label for button
var lifeLabel = new Text2('LIFE', {
	size: 36,
	fill: 0xFFFFFF,
	font: "'Arial Black'"
});
lifeLabel.anchor.set(0.5, 0.5);
lifeLabel.x = 145; // Center of button (250/2 + 20 offset for button position)
lifeLabel.y = -70; // Center of button (100/2 + 20 offset for button position)
LK.gui.bottomLeft.addChild(lifeLabel);
// Create price label for button with dynamic pricing
var maxLifePrice = calculateCumulativeCost(maxHealthUpgrades);
var priceLabel = new Text2(maxLifePrice + ' Zoin' + (maxLifePrice === 1 ? '' : 's'), {
	size: 24,
	fill: 0xFFD700
});
priceLabel.anchor.set(0.5, 1);
priceLabel.x = 145; // Center of button horizontally
priceLabel.y = -25; // Bottom of button
LK.gui.bottomLeft.addChild(priceLabel);
// Make button interactive
bottomLeftButton.buttonMode = true;
// Add button click handlers
bottomLeftButton.down = function (x, y, obj) {
	var currentPrice = calculateCumulativeCost(maxHealthUpgrades);
	if (zoins < currentPrice) {
		return; // Don't allow clicking if insufficient zoins
	}
	// Change to white when pressed
	tween(bottomLeftButton, {
		tint: 0xFFFFFF
	}, {
		duration: 100,
		easing: tween.easeOut
	});
};
bottomLeftButton.up = function (x, y, obj) {
	var currentPrice = calculateCumulativeCost(maxHealthUpgrades);
	if (zoins < currentPrice) {
		return; // Don't allow clicking if insufficient zoins
	}
	// Deduct cost from zoins
	zoins = zoins - currentPrice;
	storage.zoins = zoins; // Persist updated zoin count
	zoinText.setText('Zoins: ' + zoins);
	// Increment upgrade level
	maxHealthUpgrades++;
	storage.maxHealthUpgrades = maxHealthUpgrades; // Persist upgrade level
	// Update player max health
	player.maxHealth = (maxHealthUpgrades + 1) * 2;
	player.health = player.maxHealth; // Full heal on upgrade
	// Update health bar to reflect new maximum
	var healthPercent = player.health / player.maxHealth;
	healthBarFill.width = 1843 * healthPercent;
	healthText.setText(player.health + '/' + player.maxHealth);
	// Update price label with new cost
	var newPrice = calculateCumulativeCost(maxHealthUpgrades);
	priceLabel.setText(newPrice + ' Zoin' + (newPrice === 1 ? '' : 's'));
	// Change back to red when released
	tween(bottomLeftButton, {
		tint: 0xFF0000
	}, {
		duration: 100,
		easing: tween.easeOut
	});
};
// Create second button next to the max life button
var secondButton = LK.getAsset('ammoBox', {
	width: 250,
	height: 100,
	anchorX: 0,
	anchorY: 1
});
secondButton.tint = 0xFFFF00; // Yellow background
secondButton.x = 290; // Position next to max life button (20 + 250 + 20 space = 290)
secondButton.y = -20;
LK.gui.bottomLeft.addChild(secondButton);
// Create black outline for second button
var secondButtonOutline = LK.getAsset('ammoBox', {
	width: 256,
	height: 106,
	anchorX: 0,
	anchorY: 1
});
secondButtonOutline.tint = 0x000000; // Black outline
secondButtonOutline.x = 287; // Position outline behind second button
secondButtonOutline.y = -17;
LK.gui.bottomLeft.addChildAt(secondButtonOutline, 0); // Add behind the button
// Create FIRE RATE label for second button
var fireRateLabel = new Text2('FIRE RATE', {
	size: 36,
	fill: 0xFFFFFF,
	font: "'Arial Black'"
});
fireRateLabel.anchor.set(0.5, 0.5);
fireRateLabel.x = 415; // Center of second button (250/2 + 290 offset for button position)
fireRateLabel.y = -70; // Center of button (100/2 + 20 offset for button position)
LK.gui.bottomLeft.addChild(fireRateLabel);
// Create price label for second button with dynamic pricing
var fireRatePrice = calculateCumulativeCost(fireRateUpgrades);
var fireRatePriceLabel = new Text2(fireRatePrice + ' Zoin' + (fireRatePrice === 1 ? '' : 's'), {
	size: 24,
	fill: 0xFFD700
});
fireRatePriceLabel.anchor.set(0.5, 1);
fireRatePriceLabel.x = 415; // Center of second button horizontally
fireRatePriceLabel.y = -25; // Bottom of button
LK.gui.bottomLeft.addChild(fireRatePriceLabel);
// Make second button interactive
secondButton.buttonMode = true;
// Add second button click handlers
secondButton.down = function (x, y, obj) {
	var currentPrice = calculateCumulativeCost(fireRateUpgrades);
	if (zoins < currentPrice) {
		return; // Don't allow clicking if insufficient zoins
	}
	// Change to white when pressed
	tween(secondButton, {
		tint: 0xFFFFFF
	}, {
		duration: 100,
		easing: tween.easeOut
	});
};
secondButton.up = function (x, y, obj) {
	var currentPrice = calculateCumulativeCost(fireRateUpgrades);
	if (zoins < currentPrice) {
		return; // Don't allow clicking if insufficient zoins
	}
	// Deduct cost from zoins
	zoins = zoins - currentPrice;
	storage.zoins = zoins; // Persist updated zoin count
	zoinText.setText('Zoins: ' + zoins);
	// Increment upgrade level
	fireRateUpgrades++;
	storage.fireRateUpgrades = fireRateUpgrades; // Persist upgrade level
	// Update player fire rate
	player.fireRate = 3 * Math.pow(1.1, fireRateUpgrades);
	// Update price label with new cost
	var newPrice = calculateCumulativeCost(fireRateUpgrades);
	fireRatePriceLabel.setText(newPrice + ' Zoin' + (newPrice === 1 ? '' : 's'));
	// Change back to yellow when released
	tween(secondButton, {
		tint: 0xFFFF00
	}, {
		duration: 100,
		easing: tween.easeOut
	});
};
// Start music
LK.playMusic('battleMusic');
;

===================================================================
--- original.js
+++ change.js
@@ -842,8 +842,9 @@
 			if (player.takeDamage(zombie.damage)) {
 				// Submit score to leaderboard before game over
 				submitScoreToLeaderboard();
 				LK.showGameOver();
+				return; // Exit game loop immediately when player dies
 			}
 			zombie.attackCooldown = 60;
 			killStreak = 0;
 			scoreMultiplier = 1;