/**** 
* 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 = 8;
	self.directionX = 0;
	self.directionY = 0;
	self.isDestroyed = false;
	self.update = function () {
		if (self.isDestroyed) return;
		self.x += self.directionX * self.speed;
		self.y += self.directionY * self.speed;
		// Remove if off screen
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
			self.isDestroyed = true;
			self.shouldRemove = true;
		}
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Add weapon visual
	var weapon = self.attachAsset('gun', {
		anchorX: 0.5,
		anchorY: 1,
		scaleX: 1,
		scaleY: 1,
		y: -25
	});
	self.aimAtPoint = function (targetX, targetY) {
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		var angle = Math.atan2(dy, dx) - Math.PI / 2;
		weapon.rotation = angle;
	};
	return self;
});
var ShopSystem = Container.expand(function () {
	var self = Container.call(this);
	// Shop background
	var shopBg = self.attachAsset('shopBackground', {
		width: 1800,
		height: 2200,
		color: 0x333333,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Title
	var titleText = new Text2('SHOP', {
		size: 120,
		fill: 0xFFFFFF
	});
	titleText.anchor.set(0.5, 0.5);
	titleText.x = 0;
	titleText.y = -800;
	self.addChild(titleText);
	// Coins display
	var coinsText = new Text2('Coins: ' + (storage.coins || 0), {
		size: 80,
		fill: 0xFFD700
	});
	coinsText.anchor.set(0.5, 0.5);
	coinsText.x = 0;
	coinsText.y = -650;
	self.addChild(coinsText);
	// Shop items
	var items = [{
		name: 'Faster Shooting',
		price: 500,
		type: 'shootSpeed'
	}, {
		name: 'More Damage',
		price: 800,
		type: 'damage'
	}, {
		name: 'Bigger Bullets',
		price: 300,
		type: 'bulletSize'
	}];
	var itemButtons = [];
	for (var i = 0; i < items.length; i++) {
		var item = items[i];
		var yPos = -300 + i * 200;
		// Item button background
		var buttonBg = self.addChild(LK.getAsset('itemButton', {
			width: 1400,
			height: 150,
			color: 0x555555,
			shape: 'box',
			anchorX: 0.5,
			anchorY: 0.5,
			x: 0,
			y: yPos
		}));
		// Item text
		var itemText = new Text2(item.name + ' - ' + item.price + ' coins', {
			size: 60,
			fill: 0xFFFFFF
		});
		itemText.anchor.set(0.5, 0.5);
		itemText.x = 0;
		itemText.y = yPos;
		self.addChild(itemText);
		itemButtons.push({
			button: buttonBg,
			item: item,
			text: itemText
		});
	}
	// Close button
	var closeButton = self.addChild(LK.getAsset('closeButton', {
		width: 200,
		height: 100,
		color: 0xff4444,
		shape: 'box',
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: 800
	}));
	var closeText = new Text2('CLOSE', {
		size: 50,
		fill: 0xFFFFFF
	});
	closeText.anchor.set(0.5, 0.5);
	closeText.x = 0;
	closeText.y = 800;
	self.addChild(closeText);
	// Touch handlers
	self.down = function (x, y, obj) {
		// Safe coordinate conversion with fallback
		var localPos;
		if (obj && obj.parent && obj.position) {
			localPos = self.toLocal(obj.parent.toGlobal(obj.position));
		} else {
			// Fallback to using x,y coordinates directly
			localPos = {
				x: x,
				y: y
			};
		}
		// Check close button
		if (Math.abs(localPos.x) < 100 && Math.abs(localPos.y - 800) < 50) {
			self.visible = false;
			return;
		}
		// Check item buttons
		for (var i = 0; i < itemButtons.length; i++) {
			var btn = itemButtons[i];
			var btnY = -300 + i * 200;
			if (Math.abs(localPos.x) < 700 && Math.abs(localPos.y - btnY) < 75) {
				var currentCoins = storage.coins || 0;
				if (currentCoins >= btn.item.price) {
					storage.coins = currentCoins - btn.item.price;
					// Apply upgrade
					if (btn.item.type === 'shootSpeed') {
						shootCooldown = Math.max(5, shootCooldown - 3);
					} else if (btn.item.type === 'damage') {
						bulletDamage = (bulletDamage || 1) + 1;
					} else if (btn.item.type === 'bulletSize') {
						bulletSize = (bulletSize || 1) + 0.2;
					}
					coinsText.setText('Coins: ' + storage.coins);
				}
				break;
			}
		}
	};
	self.updateCoins = function () {
		coinsText.setText('Coins: ' + (storage.coins || 0));
	};
	return self;
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	// Choose random zombie type
	var zombieTypes = ['zombie1', 'zombie2', 'zombie3', 'zombie4'];
	var zombieType = zombieTypes[Math.floor(Math.random() * zombieTypes.length)];
	var zombieGraphics = self.attachAsset(zombieType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Varying speeds based on zombie type
	var speedVariations = [1.5, 1.2, 1.8, 1.1];
	var typeIndex = zombieTypes.indexOf(zombieType);
	self.speed = speedVariations[typeIndex] + (Math.random() * 0.4 - 0.2); // Add small random variation
	self.targetX = 1024;
	self.targetY = 1366;
	self.isDestroyed = false;
	self.update = function () {
		if (self.isDestroyed) return;
		// Move toward center
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 5) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2F4F4F
});

/**** 
* Game Code
****/ 
// Game variables
var zombies = [];
var bullets = [];
var player;
var scoreTxt;
var zombieSpawnRate = 120; // Spawn every 2 seconds initially
var zombieSpeed = 1.5;
var lastZombieSpawn = 0;
var lastShot = 0;
var shootCooldown = 15; // 15 frames between shots (4 shots per second)
// Shop system variables
var shopSystem;
var bulletDamage = 1;
var bulletSize = 1;
// Initialize coins from storage
if (!storage.coins) {
	storage.coins = 0;
}
// Create player at center
player = game.addChild(new Player());
player.x = 1024;
player.y = 1366;
// Create shop system
shopSystem = game.addChild(new ShopSystem());
shopSystem.x = 1024;
shopSystem.y = 1366;
shopSystem.visible = false;
// Create score display
scoreTxt = new Text2('0', {
	size: 100,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 100;
// Shooting function
function shootBullet(targetX, targetY) {
	if (LK.ticks - lastShot < shootCooldown) return;
	var bullet = new Bullet();
	bullet.x = player.x;
	bullet.y = player.y;
	// Calculate direction
	var dx = targetX - player.x;
	var dy = targetY - player.y;
	var distance = Math.sqrt(dx * dx + dy * dy);
	bullet.directionX = dx / distance;
	bullet.directionY = dy / distance;
	bullets.push(bullet);
	game.addChild(bullet);
	LK.getSound('gunShot').play();
	lastShot = LK.ticks;
}
// Touch/click controls
game.down = function (x, y, obj) {
	player.aimAtPoint(x, y);
	shootBullet(x, y);
};
function spawnZombie() {
	var zombie = new Zombie();
	// Random spawn from edges
	var edge = Math.floor(Math.random() * 4);
	switch (edge) {
		case 0:
			// Top
			zombie.x = Math.random() * 2048;
			zombie.y = -40;
			break;
		case 1:
			// Right
			zombie.x = 2088;
			zombie.y = Math.random() * 2732;
			break;
		case 2:
			// Bottom
			zombie.x = Math.random() * 2048;
			zombie.y = 2772;
			break;
		case 3:
			// Left
			zombie.x = -40;
			zombie.y = Math.random() * 2732;
			break;
	}
	zombie.speed = zombieSpeed;
	zombies.push(zombie);
	game.addChild(zombie);
	LK.getSound('zombieSpawn').play();
}
function checkBulletCollisions() {
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.isDestroyed) continue;
		for (var j = 0; j < zombies.length; j++) {
			var zombie = zombies[j];
			if (zombie.isDestroyed) continue;
			var dx = bullet.x - zombie.x;
			var dy = bullet.y - zombie.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < 75) {
				// Hit zombie
				bullet.isDestroyed = true;
				bullet.shouldRemove = true;
				zombie.isDestroyed = true;
				LK.getSound('zombieHit').play();
				// Add random coin reward between 52-56
				var coinReward = Math.floor(Math.random() * 5) + 52; // Random between 52-56
				LK.setScore(LK.getScore() + coinReward);
				scoreTxt.setText(LK.getScore());
				// Add coins to storage
				storage.coins = (storage.coins || 0) + coinReward;
				// Create explosion effect
				var explosion = game.addChild(LK.getAsset('explosion', {
					anchorX: 0.5,
					anchorY: 0.5,
					x: zombie.x,
					y: zombie.y,
					scaleX: 0.1,
					scaleY: 0.1
				}));
				// Animate explosion
				tween(explosion, {
					scaleX: 2,
					scaleY: 2,
					alpha: 0
				}, {
					duration: 300,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						explosion.destroy();
					}
				});
				// Mark zombie for removal
				for (var k = 0; k < zombies.length; k++) {
					if (zombies[k] === zombie) {
						zombies[k].shouldRemove = true;
						break;
					}
				}
				break;
			}
		}
	}
}
function checkGameOver() {
	for (var i = 0; i < zombies.length; i++) {
		var zombie = zombies[i];
		if (zombie.isDestroyed) continue;
		var dx = zombie.x - player.x;
		var dy = zombie.y - player.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 50) {
			LK.effects.flashScreen(0xff0000, 1000);
			// Show shop instead of game over
			shopSystem.visible = true;
			shopSystem.updateCoins();
			// Pause game
			for (var z = 0; z < zombies.length; z++) {
				zombies[z].speed = 0;
			}
			return;
		}
	}
}
game.update = function () {
	// Spawn zombies
	if (LK.ticks - lastZombieSpawn > zombieSpawnRate) {
		spawnZombie();
		lastZombieSpawn = LK.ticks;
	}
	// Clean up destroyed bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.shouldRemove) {
			bullet.destroy();
			bullets.splice(i, 1);
		}
	}
	// Clean up destroyed zombies
	for (var i = zombies.length - 1; i >= 0; i--) {
		var zombie = zombies[i];
		if (zombie.shouldRemove) {
			zombie.destroy();
			zombies.splice(i, 1);
		}
	}
	// Check bullet collisions
	checkBulletCollisions();
	// Check for game over
	checkGameOver();
};

===================================================================
--- original.js
+++ change.js
@@ -144,9 +144,19 @@
 	closeText.y = 800;
 	self.addChild(closeText);
 	// Touch handlers
 	self.down = function (x, y, obj) {
-		var localPos = self.toLocal(obj.parent.toGlobal(obj.position));
+		// Safe coordinate conversion with fallback
+		var localPos;
+		if (obj && obj.parent && obj.position) {
+			localPos = self.toLocal(obj.parent.toGlobal(obj.position));
+		} else {
+			// Fallback to using x,y coordinates directly
+			localPos = {
+				x: x,
+				y: y
+			};
+		}
 		// Check close button
 		if (Math.abs(localPos.x) < 100 && Math.abs(localPos.y - 800) < 50) {
 			self.visible = false;
 			return;