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

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 15;
	self.damage = 20;
	self.direction = {
		x: 0,
		y: -1
	}; // Default direction: up
	self.update = function () {
		self.x += self.direction.x * self.speed;
		self.y += self.direction.y * self.speed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.health = 100;
	self.maxHealth = 100;
	self.fireRate = 20; // Frames between shots
	self.fireCounter = 0;
	self.invincible = false;
	self.invincibleTimer = 0;
	self.weaponPowerLevel = 1;
	self.weaponPowerTimer = 0;
	self.takeDamage = function (amount) {
		if (self.invincible) {
			return;
		}
		self.health -= amount;
		// Create blood effect
		var blood = LK.getAsset('blood', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: self.x,
			y: self.y
		});
		game.addChild(blood);
		LK.effects.flashObject(blood, 0xff0000, 500);
		if (self.health <= 0) {
			self.health = 0;
			gameOver();
		}
		// Flash player on hit
		LK.effects.flashObject(self, 0xff0000, 500);
		// Make player invincible for a short time
		self.invincible = true;
		self.invincibleTimer = 60; // 1 second at 60fps
		// Play hit sound
		LK.getSound('playerHit').play();
		// Update health bar
		updateHealthBar();
	};
	self.collectPowerup = function (type) {
		LK.getSound('powerupCollect').play();
		if (type === 'health') {
			self.health = Math.min(self.health + 20, self.maxHealth);
			updateHealthBar();
		} else if (type === 'weapon') {
			self.weaponPowerLevel = 2;
			self.weaponPowerTimer = 300; // 5 seconds at 60fps
		}
	};
	self.update = function () {
		// Handle invincibility
		if (self.invincible) {
			self.invincibleTimer--;
			// Flicker effect
			self.alpha = self.invincibleTimer % 10 < 5 ? 0.5 : 1;
			if (self.invincibleTimer <= 0) {
				self.invincible = false;
				self.alpha = 1;
			}
		}
		// Handle weapon power timer
		if (self.weaponPowerLevel > 1) {
			self.weaponPowerTimer--;
			if (self.weaponPowerTimer <= 0) {
				self.weaponPowerLevel = 1;
			}
		}
		// Update fire counter
		if (self.fireCounter > 0) {
			self.fireCounter--;
		}
	};
	return self;
});
var Powerup = Container.expand(function () {
	var self = Container.call(this);
	var powerupGraphics = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.type = 'health'; // Can be: health, weapon
	self.lifetime = 300; // 5 seconds at 60fps
	self.init = function (type) {
		self.type = type || (Math.random() < 0.7 ? 'health' : 'weapon');
		if (self.type === 'health') {
			powerupGraphics.tint = 0x2ecc71; // Green
		} else if (self.type === 'weapon') {
			powerupGraphics.tint = 0xf39c12; // Orange
		}
	};
	self.update = function () {
		// Subtle floating animation
		self.y += Math.sin(LK.ticks * 0.1) * 0.5;
		// Fade out when about to disappear
		if (self.lifetime < 60) {
			self.alpha = self.lifetime / 60;
		}
		self.lifetime--;
	};
	return self;
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.attachAsset('zombie', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.health = 40;
	self.damage = 10;
	self.hitTimer = 0;
	self.type = 'normal'; // Can be: normal, fast, tank
	self.init = function (type) {
		self.type = type || 'normal';
		// Set zombie properties based on type
		if (self.type === 'fast') {
			self.speed = 3.5;
			self.health = 25;
			zombieGraphics.tint = 0xe74c3c; // Red tint
		} else if (self.type === 'tank') {
			self.speed = 1.2;
			self.health = 80;
			self.damage = 20;
			zombieGraphics.tint = 0x8e44ad; // Purple tint
			zombieGraphics.scale.set(1.4, 1.4);
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		// Create blood effect
		var blood = LK.getAsset('blood', {
			anchorX: 0.5,
			anchorY: 0.5,
			x: self.x,
			y: self.y
		});
		game.addChild(blood);
		LK.effects.flashObject(blood, 0xff0000, 200);
		// Flash zombie on hit
		LK.effects.flashObject(self, 0xff0000, 200);
		// Play hit sound
		LK.getSound('zombieHit').play();
		if (self.health <= 0) {
			// Add to score
			var scoreValue = self.type === 'normal' ? 10 : self.type === 'fast' ? 15 : 25;
			LK.setScore(LK.getScore() + scoreValue);
			updateScoreDisplay();
			// Chance to spawn a powerup
			if (Math.random() < 0.2) {
				spawnPowerup(self.x, self.y);
			}
			return true; // Zombie is dead
		}
		return false; // Zombie still alive
	};
	self.update = function () {
		// Move towards player
		if (player) {
			var dx = player.x - self.x;
			var dy = player.y - self.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist > 0) {
				self.x += dx / dist * self.speed;
				self.y += dy / dist * self.speed;
			}
			// Attack player on collision
			if (self.hitTimer <= 0 && self.intersects(player)) {
				player.takeDamage(self.damage);
				self.hitTimer = 30; // Half second cooldown
			}
			if (self.hitTimer > 0) {
				self.hitTimer--;
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x34495e
});

/**** 
* Game Code
****/ 
// Game variables
var player;
var bullets = [];
var zombies = [];
var powerups = [];
var waveNumber = 1;
var zombiesInWave = 5;
var waveTimer = 0;
var spawnDelay = 60; // 1 second between zombie spawns
var spawnCounter = 0;
var zombiesSpawned = 0;
var waveCooldown = false;
var gameStarted = false;
var healthBar;
var healthBarBg;
var scoreText;
var waveText;
// Setup game
function setupGame() {
	// Create player
	player = new Player();
	player.x = 2048 / 2;
	player.y = 2732 - 300;
	game.addChild(player);
	// Create health bar background
	healthBarBg = LK.getAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 2048 / 2,
		y: 2732 - 100
	});
	LK.gui.bottom.addChild(healthBarBg);
	// Create health bar
	healthBar = LK.getAsset('healthBar', {
		anchorX: 0,
		anchorY: 0.5,
		x: 2048 / 2 - 200,
		y: 2732 - 100
	});
	LK.gui.bottom.addChild(healthBar);
	// Create score text
	scoreText = new Text2('Score: 0', {
		size: 80,
		fill: 0xFFFFFF
	});
	scoreText.anchor.set(1, 0);
	LK.gui.topRight.addChild(scoreText);
	// Create wave text
	waveText = new Text2('Wave: 1', {
		size: 80,
		fill: 0xFFFFFF
	});
	waveText.anchor.set(0, 0);
	LK.gui.topRight.x -= 200; // Move right a bit to avoid topLeft corner
	LK.gui.topRight.addChild(waveText);
	// Reset game state
	LK.setScore(0);
	updateScoreDisplay();
	bullets = [];
	zombies = [];
	powerups = [];
	waveNumber = 1;
	zombiesInWave = 5;
	waveTimer = 180; // 3 second delay before first wave
	spawnCounter = 0;
	zombiesSpawned = 0;
	waveCooldown = false;
	gameStarted = true;
	// Play background music
	LK.playMusic('gameMusic', {
		fade: {
			start: 0,
			end: 0.5,
			duration: 1000
		}
	});
}
// Update score display
function updateScoreDisplay() {
	scoreText.setText('Score: ' + LK.getScore());
}
// Update wave display
function updateWaveDisplay() {
	waveText.setText('Wave: ' + waveNumber);
}
// Update health bar
function updateHealthBar() {
	if (player) {
		var healthPercentage = player.health / player.maxHealth;
		healthBar.scale.x = healthPercentage;
	}
}
// Spawn a zombie
function spawnZombie() {
	var zombie = new Zombie();
	// Determine zombie type based on wave and randomness
	var zombieType = 'normal';
	var rand = Math.random();
	if (waveNumber >= 3) {
		if (rand < 0.2) {
			zombieType = 'fast';
		} else if (waveNumber >= 5 && rand < 0.3) {
			zombieType = 'tank';
		}
	}
	zombie.init(zombieType);
	// Position zombie at a random edge of the screen
	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 = 2048 + 50;
			zombie.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom
			zombie.x = Math.random() * 2048;
			zombie.y = 2732 + 50;
			break;
		case 3:
			// Left
			zombie.x = -50;
			zombie.y = Math.random() * 2732;
			break;
	}
	zombies.push(zombie);
	game.addChild(zombie);
	zombiesSpawned++;
}
// Spawn a powerup at the given position
function spawnPowerup(x, y) {
	var powerup = new Powerup();
	powerup.x = x;
	powerup.y = y;
	powerup.init();
	powerups.push(powerup);
	game.addChild(powerup);
}
// Fire a bullet
function fireBullet() {
	if (!player || player.fireCounter > 0) {
		return;
	}
	LK.getSound('shoot').play();
	// Handle different weapon power levels
	if (player.weaponPowerLevel === 1) {
		// Single bullet
		var bullet = new Bullet();
		bullet.x = player.x;
		bullet.y = player.y - 50;
		bullets.push(bullet);
		game.addChild(bullet);
	} else if (player.weaponPowerLevel === 2) {
		// Triple shot
		for (var i = -1; i <= 1; i++) {
			var bullet = new Bullet();
			bullet.x = player.x;
			bullet.y = player.y - 50;
			var angle = i * Math.PI / 8;
			bullet.direction = {
				x: Math.sin(angle),
				y: -Math.cos(angle)
			};
			bullets.push(bullet);
			game.addChild(bullet);
		}
	}
	player.fireCounter = player.fireRate;
}
// Game over function
function gameOver() {
	LK.effects.flashScreen(0xff0000, 1000);
	LK.stopMusic();
	LK.showGameOver();
}
// Drag functionality
var isDragging = false;
// Mouse/touch down
game.down = function (x, y, obj) {
	if (!gameStarted) {
		setupGame();
		return;
	}
	isDragging = true;
	fireBullet();
};
// Mouse/touch up
game.up = function (x, y, obj) {
	isDragging = false;
};
// Mouse/touch move
game.move = function (x, y, obj) {
	if (isDragging && player) {
		player.x = x;
		player.y = y;
		// Keep player within boundaries
		player.x = Math.max(60, Math.min(player.x, 2048 - 60));
		player.y = Math.max(60, Math.min(player.y, 2732 - 60));
	}
};
// Main update function
game.update = function () {
	if (!gameStarted) {
		return;
	}
	// Wave management
	if (waveTimer > 0) {
		waveTimer--;
		if (waveTimer === 0 && waveCooldown) {
			// Start next wave
			waveNumber++;
			updateWaveDisplay();
			zombiesInWave = 5 + waveNumber * 2;
			zombiesSpawned = 0;
			waveCooldown = false;
		}
	}
	// Spawn zombies
	if (!waveCooldown && zombiesSpawned < zombiesInWave) {
		spawnCounter++;
		if (spawnCounter >= spawnDelay) {
			spawnCounter = 0;
			spawnZombie();
		}
	}
	// Check if wave is complete
	if (!waveCooldown && zombiesSpawned >= zombiesInWave && zombies.length === 0) {
		waveCooldown = true;
		waveTimer = 180; // 3 second break between waves
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		bullet.update();
		// Check if bullet is off screen
		if (bullet.x < -50 || bullet.x > 2048 + 50 || bullet.y < -50 || bullet.y > 2732 + 50) {
			bullet.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Check for collisions with zombies
		var hitZombie = false;
		for (var j = zombies.length - 1; j >= 0; j--) {
			var zombie = zombies[j];
			if (bullet.intersects(zombie)) {
				hitZombie = true;
				// Damage zombie
				if (zombie.takeDamage(bullet.damage)) {
					zombie.destroy();
					zombies.splice(j, 1);
				}
				break;
			}
		}
		// Remove bullet if it hit a zombie
		if (hitZombie) {
			bullet.destroy();
			bullets.splice(i, 1);
		}
	}
	// Update zombies
	for (var i = 0; i < zombies.length; i++) {
		zombies[i].update();
	}
	// Update powerups
	for (var i = powerups.length - 1; i >= 0; i--) {
		var powerup = powerups[i];
		powerup.update();
		// Check if powerup is collected
		if (player && powerup.intersects(player)) {
			player.collectPowerup(powerup.type);
			powerup.destroy();
			powerups.splice(i, 1);
			continue;
		}
		// Remove powerup if lifetime is over
		if (powerup.lifetime <= 0) {
			powerup.destroy();
			powerups.splice(i, 1);
		}
	}
	// Update player
	if (player) {
		player.update();
		// Auto-fire if dragging
		if (isDragging && player.fireCounter <= 0) {
			fireBullet();
		}
	}
};
// Initial setup - display start screen
var startText = new Text2('Tap to Start', {
	size: 120,
	fill: 0xFFFFFF
});
startText.anchor.set(0.5, 0.5);
LK.gui.center.addChild(startText);
var instructionText = new Text2('Drag to move, tap to shoot', {
	size: 60,
	fill: 0xFFFFFF
});
instructionText.anchor.set(0.5, 0.5);
instructionText.y = 100;
LK.gui.center.addChild(instructionText);
// Reset when tapped
LK.setInterval(function () {
	if (!gameStarted) {
		return;
	}
	startText.visible = false;
	instructionText.visible = false;
}, 100);

===================================================================
--- original.js
+++ change.js
@@ -176,9 +176,9 @@
 			var scoreValue = self.type === 'normal' ? 10 : self.type === 'fast' ? 15 : 25;
 			LK.setScore(LK.getScore() + scoreValue);
 			updateScoreDisplay();
 			// Chance to spawn a powerup
-			if (Math.random() < 0.1) {
+			if (Math.random() < 0.2) {
 				spawnPowerup(self.x, self.y);
 			}
 			return true; // Zombie is dead
 		}