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

/**** 
* Classes
****/ 
var BigDefenseTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('defenseTower', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5,
		tint: 0xFF4444
	});
	self.health = 500;
	self.maxHealth = 500;
	self.damage = 80;
	self.range = 450;
	self.shootCooldown = 0;
	self.update = function () {
		var target = self.findNearestEnemy();
		if (target && self.shootCooldown <= 0) {
			self.shootAt(target);
			self.shootCooldown = 35; // Slightly faster than regular tower
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.findNearestEnemy = function () {
		var nearest = null;
		var minDistance = Infinity;
		// Check zombies
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			var distance = Math.sqrt(Math.pow(zombie.x - self.x, 2) + Math.pow(zombie.y - self.y, 2));
			if (distance < minDistance && distance < self.range) {
				minDistance = distance;
				nearest = zombie;
			}
		}
		// Check enemy bots
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			var distance = Math.sqrt(Math.pow(bot.x - self.x, 2) + Math.pow(bot.y - self.y, 2));
			if (distance < minDistance && distance < self.range) {
				minDistance = distance;
				nearest = bot;
			}
		}
		return nearest;
	};
	self.shootAt = function (target) {
		var bullet = new BigTowerBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.targetX = target.x;
		bullet.targetY = target.y;
		bullet.damage = self.damage;
		bigTowerBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		self.destroy();
		var index = bigDefenseTowers.indexOf(self);
		if (index > -1) {
			bigDefenseTowers.splice(index, 1);
		}
	};
	return self;
});
var BigTowerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5,
		tint: 0xFF4444
	});
	self.speed = 10;
	self.damage = 80;
	self.targetX = 0;
	self.targetY = 0;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > self.speed) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		} else {
			self.explode();
		}
		// Remove if off screen
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
			self.destroy();
			var index = bigTowerBullets.indexOf(self);
			if (index > -1) {
				bigTowerBullets.splice(index, 1);
			}
		}
	};
	self.explode = function () {
		// Check for zombie hits
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			if (self.intersects(zombie)) {
				zombie.takeDamage(self.damage);
				break;
			}
		}
		// Check for enemy bot hits
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			if (self.intersects(bot)) {
				bot.takeDamage(self.damage);
				break;
			}
		}
		self.destroy();
		var index = bigTowerBullets.indexOf(self);
		if (index > -1) {
			bigTowerBullets.splice(index, 1);
		}
	};
	return self;
});
var BuyBigTowerButton = Container.expand(function () {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('buyButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.2,
		scaleY: 1.2,
		tint: 0xFF4444
	});
	var towerIcon = self.attachAsset('defenseTower', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.6,
		scaleY: 0.6,
		tint: 0xFF4444,
		y: -15
	});
	var buttonText = new Text2('Big Tower', {
		size: 28,
		fill: 0xFFFFFF
	});
	buttonText.anchor.set(0.5, 0.5);
	buttonText.y = 15;
	self.addChild(buttonText);
	var costText = new Text2('R:100 $100', {
		size: 22,
		fill: 0xFFFFFF
	});
	costText.anchor.set(0.5, 0.5);
	costText.y = 35;
	self.addChild(costText);
	self.down = function (x, y, obj) {
		var towerCost = 100;
		if (resources >= 100 && money >= towerCost) {
			// Enable big tower placement mode
			placingBigTower = true;
			LK.effects.flashObject(self, 0x00FF00, 300);
		} else {
			// Flash red if can't afford
			LK.effects.flashObject(self, 0xFF0000, 300);
		}
	};
	self.update = function () {
		var towerCost = 100 + Math.floor(wave / 2) * 15;
		var resourceCost = 100 + Math.floor(wave / 3) * 20;
		if (resources >= resourceCost && money >= towerCost) {
			buttonGraphics.tint = 0xFF2222; // Red when affordable
			buttonText.setText('Big Tower');
			costText.setText('R:' + resourceCost + ' $' + towerCost);
		} else {
			buttonGraphics.tint = 0x808080; // Gray when not affordable
			buttonText.setText('Big Tower');
			costText.setText('R:' + resourceCost + ' $' + towerCost);
		}
	};
	return self;
});
var BuyRapidFireTowerButton = Container.expand(function () {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('buyButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.0,
		scaleY: 1.0,
		tint: 0x00FF00
	});
	var towerIcon = self.attachAsset('defenseTower', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.3,
		scaleY: 0.3,
		tint: 0x00FF00,
		y: -15
	});
	var buttonText = new Text2('Rapid', {
		size: 28,
		fill: 0xFFFFFF
	});
	buttonText.anchor.set(0.5, 0.5);
	buttonText.y = 15;
	self.addChild(buttonText);
	var costText = new Text2('R:75 $40', {
		size: 22,
		fill: 0xFFFFFF
	});
	costText.anchor.set(0.5, 0.5);
	costText.y = 35;
	self.addChild(costText);
	self.down = function (x, y, obj) {
		var towerCost = 40;
		if (resources >= 75 && money >= towerCost) {
			// Enable rapid fire tower placement mode
			placingRapidFireTower = true;
			LK.effects.flashObject(self, 0x00FF00, 300);
		} else {
			// Flash red if can't afford
			LK.effects.flashObject(self, 0xFF0000, 300);
		}
	};
	self.update = function () {
		var towerCost = 40;
		if (resources >= 75 && money >= towerCost) {
			buttonGraphics.tint = 0x00AA00; // Green when affordable
			buttonText.setText('Rapid');
			costText.setText('R:75 $40');
		} else {
			buttonGraphics.tint = 0x808080; // Gray when not affordable
			buttonText.setText('Rapid');
			costText.setText('R:75 $40');
		}
	};
	return self;
});
var BuySniperTowerButton = Container.expand(function () {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('buyButton', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.0,
		scaleY: 1.0,
		tint: 0x0088FF
	});
	var towerIcon = self.attachAsset('defenseTower', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.5,
		scaleY: 0.5,
		tint: 0x0088FF,
		y: -15
	});
	var buttonText = new Text2('Sniper', {
		size: 26,
		fill: 0xFFFFFF
	});
	buttonText.anchor.set(0.5, 0.5);
	buttonText.y = 15;
	self.addChild(buttonText);
	var costText = new Text2('R:125 $75', {
		size: 20,
		fill: 0xFFFFFF
	});
	costText.anchor.set(0.5, 0.5);
	costText.y = 35;
	self.addChild(costText);
	self.down = function (x, y, obj) {
		var towerCost = 75;
		if (resources >= 125 && money >= towerCost) {
			// Enable sniper tower placement mode
			placingSniperTower = true;
			LK.effects.flashObject(self, 0x00FF00, 300);
		} else {
			// Flash red if can't afford
			LK.effects.flashObject(self, 0xFF0000, 300);
		}
	};
	self.update = function () {
		var towerCost = 75;
		if (resources >= 125 && money >= towerCost) {
			buttonGraphics.tint = 0x0066CC; // Blue when affordable
			buttonText.setText('Sniper');
			costText.setText('R:125 $75');
		} else {
			buttonGraphics.tint = 0x808080; // Gray when not affordable
			buttonText.setText('Sniper');
			costText.setText('R:125 $75');
		}
	};
	return self;
});
var BuyTowerButton = Container.expand(function () {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('buyButton', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerIcon = self.attachAsset('defenseTower', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.4,
		scaleY: 0.4,
		y: -15
	});
	var buttonText = new Text2('Tower', {
		size: 32,
		fill: 0xFFFFFF
	});
	buttonText.anchor.set(0.5, 0.5);
	buttonText.y = 15;
	self.addChild(buttonText);
	var costText = new Text2('R:50 $25', {
		size: 24,
		fill: 0xFFFFFF
	});
	costText.anchor.set(0.5, 0.5);
	costText.y = 35;
	self.addChild(costText);
	self.down = function (x, y, obj) {
		var towerCost = 25;
		if (resources >= 50 && money >= towerCost) {
			// Enable tower placement mode
			placingTower = true;
			LK.effects.flashObject(self, 0x00FF00, 300);
		} else {
			// Flash red if can't afford
			LK.effects.flashObject(self, 0xFF0000, 300);
		}
	};
	self.update = function () {
		var towerCost = 25 + Math.floor(wave / 2) * 5;
		var resourceCost = 50 + Math.floor(wave / 3) * 10;
		if (resources >= resourceCost && money >= towerCost) {
			buttonGraphics.tint = 0x4CAF50; // Green when affordable
			buttonText.setText('Tower');
			costText.setText('R:' + resourceCost + ' $' + towerCost);
		} else {
			buttonGraphics.tint = 0x808080; // Gray when not affordable
			buttonText.setText('Tower');
			costText.setText('R:' + resourceCost + ' $' + towerCost);
		}
	};
	return self;
});
var DefenseTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('defenseTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 200;
	self.maxHealth = 200;
	self.damage = 30;
	self.range = 300;
	self.shootCooldown = 0;
	self.update = function () {
		var target = self.findNearestEnemy();
		if (target && self.shootCooldown <= 0) {
			self.shootAt(target);
			self.shootCooldown = 45; // 0.75 second cooldown
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.findNearestEnemy = function () {
		var nearest = null;
		var minDistance = Infinity;
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			var distance = Math.sqrt(Math.pow(zombie.x - self.x, 2) + Math.pow(zombie.y - self.y, 2));
			if (distance < minDistance && distance < self.range) {
				minDistance = distance;
				nearest = zombie;
			}
		}
		return nearest;
	};
	self.shootAt = function (target) {
		var bullet = new TowerBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.targetX = target.x;
		bullet.targetY = target.y;
		bullet.damage = self.damage;
		towerBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		self.destroy();
		var index = defenseTowers.indexOf(self);
		if (index > -1) {
			defenseTowers.splice(index, 1);
		}
	};
	return self;
});
var EnemyBot = Container.expand(function (botType) {
	var self = Container.call(this);
	var botGraphics = self.attachAsset(botType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.botType = botType;
	// Scale bot stats based on current wave
	var healthMultiplier = 1 + (wave - 1) * 0.25; // 25% more health per wave
	var damageMultiplier = 1 + (wave - 1) * 0.15; // 15% more damage per wave
	self.health = Math.floor(150 * healthMultiplier);
	self.maxHealth = Math.floor(150 * healthMultiplier);
	self.damage = Math.floor(25 * damageMultiplier);
	self.range = 350;
	self.shootCooldown = 0;
	// Set specific properties based on bot type
	if (botType === 'artilleryBot') {
		self.damage = 60;
		self.range = 400;
		self.shootCooldown = 90; // Slower but more powerful
	} else if (botType === 'assaultBot') {
		self.damage = 20;
		self.range = 250;
		self.shootCooldown = 20; // Faster firing
	} else if (botType === 'disruptionBot') {
		self.damage = 15;
		self.range = 300;
		self.shootCooldown = 120; // Special ability cooldown
	} else if (botType === 'repairBot') {
		self.damage = 0;
		self.range = 200;
		self.shootCooldown = 180; // Repair cooldown
	}
	self.update = function () {
		var target = self.findTarget();
		if (target && self.shootCooldown <= 0) {
			if (self.botType === 'repairBot') {
				self.repairAllies();
			} else {
				self.shootAt(target);
			}
			self.shootCooldown = self.getBaseCooldown();
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.findTarget = function () {
		var targets = [];
		// Add player base as target
		var distanceToBase = Math.sqrt(Math.pow(playerBase.x - self.x, 2) + Math.pow(playerBase.y - self.y, 2));
		if (distanceToBase < self.range) {
			targets.push({
				target: playerBase,
				distance: distanceToBase
			});
		}
		// Add hero as target
		var distanceToHero = Math.sqrt(Math.pow(hero.x - self.x, 2) + Math.pow(hero.y - self.y, 2));
		if (distanceToHero < self.range) {
			targets.push({
				target: hero,
				distance: distanceToHero
			});
		}
		// Add defense towers as targets
		for (var i = 0; i < defenseTowers.length; i++) {
			var tower = defenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
			if (distance < self.range) {
				targets.push({
					target: tower,
					distance: distance
				});
			}
		}
		// Add big defense towers as targets
		for (var i = 0; i < bigDefenseTowers.length; i++) {
			var tower = bigDefenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
			if (distance < self.range) {
				targets.push({
					target: tower,
					distance: distance
				});
			}
		}
		// Add rapid fire towers as targets
		for (var i = 0; i < rapidFireTowers.length; i++) {
			var tower = rapidFireTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
			if (distance < self.range) {
				targets.push({
					target: tower,
					distance: distance
				});
			}
		}
		// Add sniper towers as targets
		for (var i = 0; i < sniperTowers.length; i++) {
			var tower = sniperTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
			if (distance < self.range) {
				targets.push({
					target: tower,
					distance: distance
				});
			}
		}
		// Return nearest target
		if (targets.length > 0) {
			targets.sort(function (a, b) {
				return a.distance - b.distance;
			});
			return targets[0].target;
		}
		return null;
	};
	self.shootAt = function (target) {
		var bullet = new EnemyBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.targetX = target.x;
		bullet.targetY = target.y;
		bullet.damage = self.damage;
		bullet.isAOE = self.botType === 'artilleryBot';
		enemyBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	self.repairAllies = function () {
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			if (bot !== self) {
				var distance = Math.sqrt(Math.pow(bot.x - self.x, 2) + Math.pow(bot.y - self.y, 2));
				if (distance < self.range) {
					bot.health = Math.min(bot.health + 30, bot.maxHealth);
					LK.effects.flashObject(bot, 0x00ff00, 300);
				}
			}
		}
	};
	self.getBaseCooldown = function () {
		if (self.botType === 'artilleryBot') return 90;
		if (self.botType === 'assaultBot') return 20;
		if (self.botType === 'disruptionBot') return 120;
		if (self.botType === 'repairBot') return 180;
		return 60;
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		LK.getSound('explosion').play();
		LK.setScore(LK.getScore() + 25);
		scoreText.setText('Score: ' + LK.getScore());
		// Add money and spawn money icon
		var moneyEarned = 15;
		money += moneyEarned;
		moneyText.setText('Money: $' + money);
		var moneyIcon = new MoneyIcon(moneyEarned);
		moneyIcon.x = self.x;
		moneyIcon.y = self.y;
		moneyIcons.push(moneyIcon);
		game.addChild(moneyIcon);
		self.destroy();
		var index = enemyBots.indexOf(self);
		if (index > -1) {
			enemyBots.splice(index, 1);
		}
	};
	return self;
});
var EnemyBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('enemyBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.damage = 25;
	self.targetX = 0;
	self.targetY = 0;
	self.isAOE = false;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > self.speed) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		} else {
			self.explode();
		}
		// Remove if off screen
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
			self.destroy();
			var index = enemyBullets.indexOf(self);
			if (index > -1) {
				enemyBullets.splice(index, 1);
			}
		}
	};
	self.explode = function () {
		if (self.isAOE) {
			// AOE damage
			var explosion = LK.getAsset('explosion', {
				anchorX: 0.5,
				anchorY: 0.5,
				x: self.x,
				y: self.y,
				alpha: 0.7
			});
			game.addChild(explosion);
			tween(explosion, {
				alpha: 0,
				scaleX: 2,
				scaleY: 2
			}, {
				duration: 500,
				onFinish: function onFinish() {
					explosion.destroy();
				}
			});
			// Damage everything in range
			var explosionRange = 150;
			if (self.intersects(playerBase)) {
				playerBase.takeDamage(self.damage);
			}
			if (self.intersects(hero)) {
				hero.takeDamage(self.damage);
			}
			for (var i = 0; i < defenseTowers.length; i++) {
				var tower = defenseTowers[i];
				var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
				if (distance < explosionRange) {
					tower.takeDamage(self.damage);
				}
			}
			for (var i = 0; i < bigDefenseTowers.length; i++) {
				var tower = bigDefenseTowers[i];
				var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
				if (distance < explosionRange) {
					tower.takeDamage(self.damage);
				}
			}
			for (var i = 0; i < rapidFireTowers.length; i++) {
				var tower = rapidFireTowers[i];
				var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
				if (distance < explosionRange) {
					tower.takeDamage(self.damage);
				}
			}
			for (var i = 0; i < sniperTowers.length; i++) {
				var tower = sniperTowers[i];
				var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
				if (distance < explosionRange) {
					tower.takeDamage(self.damage);
				}
			}
			LK.getSound('explosion').play();
		} else {
			// Single target damage
			if (self.intersects(playerBase)) {
				playerBase.takeDamage(self.damage);
			} else if (self.intersects(hero)) {
				hero.takeDamage(self.damage);
			} else {
				for (var i = 0; i < defenseTowers.length; i++) {
					var tower = defenseTowers[i];
					if (self.intersects(tower)) {
						tower.takeDamage(self.damage);
						break;
					}
				}
				for (var i = 0; i < bigDefenseTowers.length; i++) {
					var tower = bigDefenseTowers[i];
					if (self.intersects(tower)) {
						tower.takeDamage(self.damage);
						break;
					}
				}
				for (var i = 0; i < rapidFireTowers.length; i++) {
					var tower = rapidFireTowers[i];
					if (self.intersects(tower)) {
						tower.takeDamage(self.damage);
						break;
					}
				}
				for (var i = 0; i < sniperTowers.length; i++) {
					var tower = sniperTowers[i];
					if (self.intersects(tower)) {
						tower.takeDamage(self.damage);
						break;
					}
				}
			}
		}
		self.destroy();
		var index = enemyBullets.indexOf(self);
		if (index > -1) {
			enemyBullets.splice(index, 1);
		}
	};
	return self;
});
var Hero = Container.expand(function () {
	var self = Container.call(this);
	var heroGraphics = self.attachAsset('hero', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 300;
	self.maxHealth = 300;
	self.speed = 3;
	self.damage = 40;
	self.shootCooldown = 0;
	self.targetX = self.x;
	self.targetY = self.y;
	self.update = function () {
		// Move towards target position
		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;
		}
		// Auto-attack nearest enemy
		var nearestEnemy = self.findNearestEnemy();
		if (nearestEnemy && self.shootCooldown <= 0) {
			self.shootAt(nearestEnemy);
			self.shootCooldown = 30; // 0.5 second cooldown
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.findNearestEnemy = function () {
		var nearest = null;
		var minDistance = Infinity;
		// Check zombies
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			var distance = Math.sqrt(Math.pow(zombie.x - self.x, 2) + Math.pow(zombie.y - self.y, 2));
			if (distance < minDistance && distance < 400) {
				minDistance = distance;
				nearest = zombie;
			}
		}
		// Check enemy bots
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			var distance = Math.sqrt(Math.pow(bot.x - self.x, 2) + Math.pow(bot.y - self.y, 2));
			if (distance < minDistance && distance < 400) {
				minDistance = distance;
				nearest = bot;
			}
		}
		return nearest;
	};
	self.shootAt = function (target) {
		var bullet = new HeroBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.targetX = target.x;
		bullet.targetY = target.y;
		bullet.damage = self.damage;
		heroBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	self.moveTo = function (x, y) {
		self.targetX = x;
		self.targetY = y;
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.effects.flashObject(self, 0xff0000, 300);
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		gameOver = true;
		LK.showGameOver();
	};
	return self;
});
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('heroBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.damage = 40;
	self.targetX = 0;
	self.targetY = 0;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > self.speed) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		} else {
			self.explode();
		}
		// Remove if off screen
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
			self.destroy();
			var index = heroBullets.indexOf(self);
			if (index > -1) {
				heroBullets.splice(index, 1);
			}
		}
	};
	self.explode = function () {
		// Check for zombie hits
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			if (self.intersects(zombie)) {
				zombie.takeDamage(self.damage);
				self.destroy();
				var index = heroBullets.indexOf(self);
				if (index > -1) {
					heroBullets.splice(index, 1);
				}
				return;
			}
		}
		// Check for enemy bot hits
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			if (self.intersects(bot)) {
				bot.takeDamage(self.damage);
				self.destroy();
				var index = heroBullets.indexOf(self);
				if (index > -1) {
					heroBullets.splice(index, 1);
				}
				return;
			}
		}
		self.destroy();
		var index = heroBullets.indexOf(self);
		if (index > -1) {
			heroBullets.splice(index, 1);
		}
	};
	return self;
});
var MoneyIcon = Container.expand(function (amount) {
	var self = Container.call(this);
	var moneyGraphics = self.attachAsset('money', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var moneyText = new Text2('+$' + amount, {
		size: 30,
		fill: 0xFFD700
	});
	moneyText.anchor.set(0.5, 0.5);
	moneyText.x = 30;
	self.addChild(moneyText);
	self.lifeTime = 120; // 2 seconds at 60fps
	self.floatSpeed = -2;
	self.update = function () {
		self.y += self.floatSpeed;
		self.alpha -= 0.02;
		self.lifeTime--;
		if (self.lifeTime <= 0 || self.alpha <= 0) {
			self.destroy();
			var index = moneyIcons.indexOf(self);
			if (index > -1) {
				moneyIcons.splice(index, 1);
			}
		}
	};
	return self;
});
var PlayerBase = Container.expand(function () {
	var self = Container.call(this);
	var baseGraphics = self.attachAsset('playerBase', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 1000;
	self.maxHealth = 1000;
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.effects.flashObject(self, 0xff0000, 300);
		healthText.setText('Base Health: ' + self.health + '/' + self.maxHealth);
		if (self.health <= 0) {
			gameOver = true;
			LK.showGameOver();
		}
	};
	return self;
});
var RapidFireBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.6,
		scaleY: 0.6,
		tint: 0x00FF00
	});
	self.speed = 12;
	self.damage = 15;
	self.targetX = 0;
	self.targetY = 0;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > self.speed) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		} else {
			self.explode();
		}
		// Remove if off screen
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
			self.destroy();
			var index = rapidFireBullets.indexOf(self);
			if (index > -1) {
				rapidFireBullets.splice(index, 1);
			}
		}
	};
	self.explode = function () {
		// Check for zombie hits
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			if (self.intersects(zombie)) {
				zombie.takeDamage(self.damage);
				break;
			}
		}
		// Check for enemy bot hits
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			if (self.intersects(bot)) {
				bot.takeDamage(self.damage);
				break;
			}
		}
		self.destroy();
		var index = rapidFireBullets.indexOf(self);
		if (index > -1) {
			rapidFireBullets.splice(index, 1);
		}
	};
	return self;
});
var RapidFireTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('defenseTower', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.8,
		scaleY: 0.8,
		tint: 0x00FF00
	});
	self.health = 150;
	self.maxHealth = 150;
	self.damage = 15;
	self.range = 250;
	self.shootCooldown = 0;
	self.update = function () {
		var target = self.findNearestEnemy();
		if (target && self.shootCooldown <= 0) {
			self.shootAt(target);
			self.shootCooldown = 15; // Very fast firing
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.findNearestEnemy = function () {
		var nearest = null;
		var minDistance = Infinity;
		// Check zombies
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			var distance = Math.sqrt(Math.pow(zombie.x - self.x, 2) + Math.pow(zombie.y - self.y, 2));
			if (distance < minDistance && distance < self.range) {
				minDistance = distance;
				nearest = zombie;
			}
		}
		// Check enemy bots
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			var distance = Math.sqrt(Math.pow(bot.x - self.x, 2) + Math.pow(bot.y - self.y, 2));
			if (distance < minDistance && distance < self.range) {
				minDistance = distance;
				nearest = bot;
			}
		}
		return nearest;
	};
	self.shootAt = function (target) {
		var bullet = new RapidFireBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.targetX = target.x;
		bullet.targetY = target.y;
		bullet.damage = self.damage;
		rapidFireBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		self.destroy();
		var index = rapidFireTowers.indexOf(self);
		if (index > -1) {
			rapidFireTowers.splice(index, 1);
		}
	};
	return self;
});
var SniperBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.8,
		scaleY: 1.8,
		tint: 0x0088FF
	});
	self.speed = 15;
	self.damage = 120;
	self.targetX = 0;
	self.targetY = 0;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > self.speed) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		} else {
			self.explode();
		}
		// Remove if off screen
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
			self.destroy();
			var index = sniperBullets.indexOf(self);
			if (index > -1) {
				sniperBullets.splice(index, 1);
			}
		}
	};
	self.explode = function () {
		// Check for zombie hits
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			if (self.intersects(zombie)) {
				zombie.takeDamage(self.damage);
				break;
			}
		}
		// Check for enemy bot hits
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			if (self.intersects(bot)) {
				bot.takeDamage(self.damage);
				break;
			}
		}
		self.destroy();
		var index = sniperBullets.indexOf(self);
		if (index > -1) {
			sniperBullets.splice(index, 1);
		}
	};
	return self;
});
var SniperTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('defenseTower', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.2,
		scaleY: 1.2,
		tint: 0x0088FF
	});
	self.health = 250;
	self.maxHealth = 250;
	self.damage = 120;
	self.range = 600;
	self.shootCooldown = 0;
	self.update = function () {
		var target = self.findNearestEnemy();
		if (target && self.shootCooldown <= 0) {
			self.shootAt(target);
			self.shootCooldown = 80; // Slow but powerful
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.findNearestEnemy = function () {
		var nearest = null;
		var minDistance = Infinity;
		// Check zombies
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			var distance = Math.sqrt(Math.pow(zombie.x - self.x, 2) + Math.pow(zombie.y - self.y, 2));
			if (distance < minDistance && distance < self.range) {
				minDistance = distance;
				nearest = zombie;
			}
		}
		// Check enemy bots
		for (var i = 0; i < enemyBots.length; i++) {
			var bot = enemyBots[i];
			var distance = Math.sqrt(Math.pow(bot.x - self.x, 2) + Math.pow(bot.y - self.y, 2));
			if (distance < minDistance && distance < self.range) {
				minDistance = distance;
				nearest = bot;
			}
		}
		return nearest;
	};
	self.shootAt = function (target) {
		var bullet = new SniperBullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.targetX = target.x;
		bullet.targetY = target.y;
		bullet.damage = self.damage;
		sniperBullets.push(bullet);
		game.addChild(bullet);
		LK.getSound('shoot').play();
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		self.destroy();
		var index = sniperTowers.indexOf(self);
		if (index > -1) {
			sniperTowers.splice(index, 1);
		}
	};
	return self;
});
var TowerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.damage = 30;
	self.targetX = 0;
	self.targetY = 0;
	self.update = function () {
		var dx = self.targetX - self.x;
		var dy = self.targetY - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > self.speed) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		} else {
			self.explode();
		}
		// Remove if off screen
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
			self.destroy();
			var index = towerBullets.indexOf(self);
			if (index > -1) {
				towerBullets.splice(index, 1);
			}
		}
	};
	self.explode = function () {
		// Check for zombie hits
		for (var i = 0; i < zombies.length; i++) {
			var zombie = zombies[i];
			if (self.intersects(zombie)) {
				zombie.takeDamage(self.damage);
				break;
			}
		}
		self.destroy();
		var index = towerBullets.indexOf(self);
		if (index > -1) {
			towerBullets.splice(index, 1);
		}
	};
	return self;
});
var Zombie = Container.expand(function () {
	var self = Container.call(this);
	var zombieGraphics = self.attachAsset('zombie', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Scale health and damage based on current wave
	var healthMultiplier = 1 + (wave - 1) * 0.3; // 30% more health per wave
	var damageMultiplier = 1 + (wave - 1) * 0.2; // 20% more damage per wave
	var speedMultiplier = 1 + (wave - 1) * 0.1; // 10% faster per wave
	self.health = Math.floor(100 * healthMultiplier);
	self.maxHealth = Math.floor(100 * healthMultiplier);
	self.speed = Math.min(3, 1 * speedMultiplier); // Cap speed at 3
	self.damage = Math.floor(20 * damageMultiplier);
	self.target = null;
	self.attackCooldown = 0;
	self.update = function () {
		if (!self.target) {
			self.target = playerBase;
		}
		// Move towards target
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance > 50) {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		} else {
			// Attack target
			if (self.attackCooldown <= 0) {
				if (self.target === playerBase) {
					playerBase.takeDamage(self.damage);
				}
				self.attackCooldown = 60; // 1 second cooldown
			}
		}
		if (self.attackCooldown > 0) {
			self.attackCooldown--;
		}
	};
	self.takeDamage = function (amount) {
		self.health -= amount;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			self.die();
		}
	};
	self.die = function () {
		LK.getSound('zombieHit').play();
		LK.setScore(LK.getScore() + 10);
		scoreText.setText('Score: ' + LK.getScore());
		// Add money and spawn money icon
		var moneyEarned = 5;
		money += moneyEarned;
		moneyText.setText('Money: $' + money);
		var moneyIcon = new MoneyIcon(moneyEarned);
		moneyIcon.x = self.x;
		moneyIcon.y = self.y;
		moneyIcons.push(moneyIcon);
		game.addChild(moneyIcon);
		self.destroy();
		var index = zombies.indexOf(self);
		if (index > -1) {
			zombies.splice(index, 1);
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2a2a2a
});

/**** 
* Game Code
****/ 
// Game state variables
var gameOver = false;
var wave = 1;
var zombiesSpawned = 0;
var zombiesPerWave = 5;
var spawnTimer = 0;
var botSpawnTimer = 0;
var resources = 100;
var money = 0;
var placingTower = false;
var placingBigTower = false;
var placingRapidFireTower = false;
var placingSniperTower = false;
// Game objects arrays
var zombies = [];
var enemyBots = [];
var defenseTowers = [];
var bigDefenseTowers = [];
var rapidFireTowers = [];
var sniperTowers = [];
var towerBullets = [];
var bigTowerBullets = [];
var rapidFireBullets = [];
var sniperBullets = [];
var heroBullets = [];
var enemyBullets = [];
var moneyIcons = [];
// Create player base
var playerBase = new PlayerBase();
playerBase.x = 1024;
playerBase.y = 2400;
game.addChild(playerBase);
// Create hero
var hero = new Hero();
hero.x = 1024;
hero.y = 2200;
game.addChild(hero);
// Create UI elements
var scoreText = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0, 0);
LK.gui.topRight.addChild(scoreText);
var healthText = new Text2('Base Health: 1000/1000', {
	size: 50,
	fill: 0xFFFFFF
});
healthText.anchor.set(0, 0);
healthText.x = -400;
LK.gui.topRight.addChild(healthText);
var waveText = new Text2('Wave: 1', {
	size: 55,
	fill: 0xFFFF00
});
waveText.anchor.set(0.5, 0);
LK.gui.top.addChild(waveText);
var resourceText = new Text2('Resources: 100', {
	size: 45,
	fill: 0x00FF00
});
resourceText.anchor.set(0, 0);
LK.gui.bottomLeft.addChild(resourceText);
var moneyText = new Text2('Money: $0', {
	size: 45,
	fill: 0xFFD700
});
moneyText.anchor.set(0.5, 0);
moneyText.y = 60;
LK.gui.bottom.addChild(moneyText);
// Create buy tower button
var buyTowerButton = new BuyTowerButton();
buyTowerButton.x = 120;
buyTowerButton.y = -120;
LK.gui.bottomLeft.addChild(buyTowerButton);
// Create buy big tower button
var buyBigTowerButton = new BuyBigTowerButton();
buyBigTowerButton.x = 280;
buyBigTowerButton.y = -120;
LK.gui.bottomLeft.addChild(buyBigTowerButton);
// Create buy rapid fire tower button
var buyRapidFireTowerButton = new BuyRapidFireTowerButton();
buyRapidFireTowerButton.x = 440;
buyRapidFireTowerButton.y = -120;
LK.gui.bottomLeft.addChild(buyRapidFireTowerButton);
// Create buy sniper tower button
var buySniperTowerButton = new BuySniperTowerButton();
buySniperTowerButton.x = 600;
buySniperTowerButton.y = -120;
LK.gui.bottomLeft.addChild(buySniperTowerButton);
// Game control functions
function spawnZombie() {
	var zombie = new Zombie();
	// Spawn from random edge
	var edge = Math.floor(Math.random() * 4);
	if (edge === 0) {
		// Top
		zombie.x = Math.random() * 2048;
		zombie.y = 0;
	} else if (edge === 1) {
		// Right
		zombie.x = 2048;
		zombie.y = Math.random() * 2732;
	} else if (edge === 2) {
		// Bottom
		zombie.x = Math.random() * 2048;
		zombie.y = 2732;
	} else {
		// Left
		zombie.x = 0;
		zombie.y = Math.random() * 2732;
	}
	zombies.push(zombie);
	game.addChild(zombie);
	zombiesSpawned++;
}
function spawnEnemyBot() {
	var botTypes = ['artilleryBot', 'assaultBot', 'disruptionBot', 'repairBot'];
	var randomType = botTypes[Math.floor(Math.random() * botTypes.length)];
	var bot = new EnemyBot(randomType);
	bot.x = Math.random() * 1800 + 124;
	bot.y = Math.random() * 1000 + 200;
	enemyBots.push(bot);
	game.addChild(bot);
}
function buildDefenseTower(x, y) {
	var towerCost = 25 + Math.floor(wave / 2) * 5; // Increase cost every 2 waves
	var resourceCost = 50 + Math.floor(wave / 3) * 10; // Increase resource cost every 3 waves
	if (resources >= resourceCost && money >= towerCost) {
		var tower = new DefenseTower();
		tower.x = x;
		tower.y = y;
		defenseTowers.push(tower);
		game.addChild(tower);
		resources -= resourceCost;
		money -= towerCost;
		resourceText.setText('Resources: ' + resources);
		moneyText.setText('Money: $' + money);
	}
}
function buildBigDefenseTower(x, y) {
	var towerCost = 100 + Math.floor(wave / 2) * 15; // Increase cost every 2 waves
	var resourceCost = 100 + Math.floor(wave / 3) * 20; // Increase resource cost every 3 waves
	if (resources >= resourceCost && money >= towerCost) {
		var tower = new BigDefenseTower();
		tower.x = x;
		tower.y = y;
		bigDefenseTowers.push(tower);
		game.addChild(tower);
		resources -= resourceCost;
		money -= towerCost;
		resourceText.setText('Resources: ' + resources);
		moneyText.setText('Money: $' + money);
	}
}
function buildRapidFireTower(x, y) {
	var towerCost = 40; // Money cost for rapid fire tower
	if (resources >= 75 && money >= towerCost) {
		var tower = new RapidFireTower();
		tower.x = x;
		tower.y = y;
		rapidFireTowers.push(tower);
		game.addChild(tower);
		resources -= 75;
		money -= towerCost;
		resourceText.setText('Resources: ' + resources);
		moneyText.setText('Money: $' + money);
	}
}
function buildSniperTower(x, y) {
	var towerCost = 75; // Money cost for sniper tower
	if (resources >= 125 && money >= towerCost) {
		var tower = new SniperTower();
		tower.x = x;
		tower.y = y;
		sniperTowers.push(tower);
		game.addChild(tower);
		resources -= 125;
		money -= towerCost;
		resourceText.setText('Resources: ' + resources);
		moneyText.setText('Money: $' + money);
	}
}
// Event handlers
game.down = function (x, y, obj) {
	if (placingTower) {
		// Tower placement mode
		var canBuild = true;
		var minDistance = 120;
		// Check distance from other towers
		for (var i = 0; i < defenseTowers.length; i++) {
			var tower = defenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		// Check distance from big towers
		for (var i = 0; i < bigDefenseTowers.length; i++) {
			var tower = bigDefenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		// Check distance from base
		var distanceToBase = Math.sqrt(Math.pow(playerBase.x - x, 2) + Math.pow(playerBase.y - y, 2));
		if (distanceToBase < 150) {
			canBuild = false;
		}
		// Check distance from hero
		var distanceToHero = Math.sqrt(Math.pow(hero.x - x, 2) + Math.pow(hero.y - y, 2));
		if (distanceToHero < 100) {
			canBuild = false;
		}
		if (canBuild && y < 2300) {
			// Don't build too close to base area
			buildDefenseTower(x, y);
			placingTower = false; // Exit placement mode after building
		}
	} else if (placingBigTower) {
		// Big tower placement mode
		var canBuild = true;
		var minDistance = 150;
		// Check distance from regular towers
		for (var i = 0; i < defenseTowers.length; i++) {
			var tower = defenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		// Check distance from other big towers
		for (var i = 0; i < bigDefenseTowers.length; i++) {
			var tower = bigDefenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		// Check distance from base
		var distanceToBase = Math.sqrt(Math.pow(playerBase.x - x, 2) + Math.pow(playerBase.y - y, 2));
		if (distanceToBase < 200) {
			canBuild = false;
		}
		// Check distance from hero
		var distanceToHero = Math.sqrt(Math.pow(hero.x - x, 2) + Math.pow(hero.y - y, 2));
		if (distanceToHero < 120) {
			canBuild = false;
		}
		if (canBuild && y < 2300) {
			// Don't build too close to base area
			buildBigDefenseTower(x, y);
			placingBigTower = false; // Exit placement mode after building
		}
	} else if (placingRapidFireTower) {
		// Rapid fire tower placement mode
		var canBuild = true;
		var minDistance = 100;
		// Check distance from all towers
		for (var i = 0; i < defenseTowers.length; i++) {
			var tower = defenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		for (var i = 0; i < bigDefenseTowers.length; i++) {
			var tower = bigDefenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		for (var i = 0; i < rapidFireTowers.length; i++) {
			var tower = rapidFireTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		for (var i = 0; i < sniperTowers.length; i++) {
			var tower = sniperTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		var distanceToBase = Math.sqrt(Math.pow(playerBase.x - x, 2) + Math.pow(playerBase.y - y, 2));
		if (distanceToBase < 120) {
			canBuild = false;
		}
		var distanceToHero = Math.sqrt(Math.pow(hero.x - x, 2) + Math.pow(hero.y - y, 2));
		if (distanceToHero < 80) {
			canBuild = false;
		}
		if (canBuild && y < 2300) {
			buildRapidFireTower(x, y);
			placingRapidFireTower = false;
		}
	} else if (placingSniperTower) {
		// Sniper tower placement mode
		var canBuild = true;
		var minDistance = 140;
		// Check distance from all towers
		for (var i = 0; i < defenseTowers.length; i++) {
			var tower = defenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		for (var i = 0; i < bigDefenseTowers.length; i++) {
			var tower = bigDefenseTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		for (var i = 0; i < rapidFireTowers.length; i++) {
			var tower = rapidFireTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		for (var i = 0; i < sniperTowers.length; i++) {
			var tower = sniperTowers[i];
			var distance = Math.sqrt(Math.pow(tower.x - x, 2) + Math.pow(tower.y - y, 2));
			if (distance < minDistance) {
				canBuild = false;
				break;
			}
		}
		var distanceToBase = Math.sqrt(Math.pow(playerBase.x - x, 2) + Math.pow(playerBase.y - y, 2));
		if (distanceToBase < 180) {
			canBuild = false;
		}
		var distanceToHero = Math.sqrt(Math.pow(hero.x - x, 2) + Math.pow(hero.y - y, 2));
		if (distanceToHero < 100) {
			canBuild = false;
		}
		if (canBuild && y < 2300) {
			buildSniperTower(x, y);
			placingSniperTower = false;
		}
	} else {
		// Normal mode - move hero
		hero.moveTo(x, y);
	}
};
// Start background music
LK.playMusic('Zombiewarmuic');
// Main game loop
game.update = function () {
	if (gameOver) return;
	// Resource generation
	if (LK.ticks % 180 === 0) {
		// Every 3 seconds
		resources += 10;
		resourceText.setText('Resources: ' + resources);
	}
	// Zombie spawning - faster spawn rate at higher waves
	if (zombiesSpawned < zombiesPerWave) {
		spawnTimer++;
		var zombieSpawnInterval = Math.max(60, 120 - (wave - 1) * 8); // Faster spawning each wave, minimum 1 second
		if (spawnTimer >= zombieSpawnInterval) {
			spawnZombie();
			spawnTimer = 0;
		}
	}
	// Enemy bot spawning - faster spawn rate at higher waves
	botSpawnTimer++;
	var botSpawnInterval = Math.max(300, 600 - (wave - 1) * 30); // Faster spawning each wave, minimum 5 seconds
	if (botSpawnTimer >= botSpawnInterval) {
		spawnEnemyBot();
		// Spawn additional bots at higher waves
		if (wave >= 5 && Math.random() < 0.3) {
			spawnEnemyBot(); // 30% chance for second bot
		}
		if (wave >= 8 && Math.random() < 0.2) {
			spawnEnemyBot(); // 20% chance for third bot
		}
		botSpawnTimer = 0;
	}
	// Check for wave completion
	if (zombiesSpawned >= zombiesPerWave && zombies.length === 0) {
		wave++;
		zombiesSpawned = 0;
		zombiesPerWave += 3 + Math.floor(wave / 3); // More zombies per wave as game progresses
		waveText.setText('Wave: ' + wave);
		// Bonus resources for completing wave - but less bonus at higher waves
		resources += Math.max(15, 35 - wave);
		resourceText.setText('Resources: ' + resources);
	}
	// Win condition
	if (wave >= 10 && zombies.length === 0 && enemyBots.length === 0) {
		LK.showYouWin();
	}
	// Update all bullets
	for (var i = towerBullets.length - 1; i >= 0; i--) {
		var bullet = towerBullets[i];
		if (bullet.destroyed) {
			towerBullets.splice(i, 1);
		}
	}
	for (var i = bigTowerBullets.length - 1; i >= 0; i--) {
		var bullet = bigTowerBullets[i];
		if (bullet.destroyed) {
			bigTowerBullets.splice(i, 1);
		}
	}
	for (var i = rapidFireBullets.length - 1; i >= 0; i--) {
		var bullet = rapidFireBullets[i];
		if (bullet.destroyed) {
			rapidFireBullets.splice(i, 1);
		}
	}
	for (var i = sniperBullets.length - 1; i >= 0; i--) {
		var bullet = sniperBullets[i];
		if (bullet.destroyed) {
			sniperBullets.splice(i, 1);
		}
	}
	for (var i = heroBullets.length - 1; i >= 0; i--) {
		var bullet = heroBullets[i];
		if (bullet.destroyed) {
			heroBullets.splice(i, 1);
		}
	}
	for (var i = enemyBullets.length - 1; i >= 0; i--) {
		var bullet = enemyBullets[i];
		if (bullet.destroyed) {
			enemyBullets.splice(i, 1);
		}
	}
	// Update money icons
	for (var i = moneyIcons.length - 1; i >= 0; i--) {
		var icon = moneyIcons[i];
		if (icon.destroyed) {
			moneyIcons.splice(i, 1);
		}
	}
};