/**** 
* Classes
****/ 
// Bullet class for projectiles fired by towers
var Bullet = Container.expand(function (startX, startY, target) {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.target = target;
	self.x = startX;
	self.y = startY;
	self.update = function () {
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 10) {
			self.destroy();
			self.target.hit();
		} else {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
			// Calculate the angle to the target
			var angle = Math.atan2(dy, dx);
			// Rotate the bullet towards the target
			bulletGraphics.rotation = angle + 90;
		}
	};
});
// Enemy class for the creatures attacking the realm
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 2;
	self.health = 100;
	self.path = [{
		x: 2010,
		y: 2600
	}, {
		x: 1000,
		y: 2600
	}, {
		x: 1000,
		y: 200
	}, {
		x: 0,
		y: 200
	}];
	self.pathIndex = 0;
	self.update = function () {
		var target = self.path[self.pathIndex];
		var dx = target.x - self.x;
		var dy = target.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < self.speed) {
			self.x = target.x;
			self.y = target.y;
			self.pathIndex++;
			if (self.pathIndex >= self.path.length) {
				// Enemy reached the end, game over logic
				LK.showGameOver();
			}
		} else {
			self.x += dx / distance * self.speed;
			self.y += dy / distance * self.speed;
		}
	};
	self.hit = function () {
		self.health -= 50;
		if (self.health <= 0) {
			self.destroy();
			if (enemies.indexOf(self) != -1) {
				enemies.splice(enemies.indexOf(self), 1);
				money += 10; // Add 10 money for killed monster
			}
		}
	};
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Tower class to represent defense towers
var Tower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('tower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.range = 600;
	self.fireRate = 60; // Fire every 60 frames
	self.fireCooldown = 0;
	// The turret's firing range is hidden and not displayed on the game screen
	self.update = function () {
		if (self.fireCooldown < 0) {
			self.fireCooldown = 0;
		}
		if (self.fireCooldown > 0) {
			self.fireCooldown--;
		}
	};
	self.canFire = function () {
		return self.fireCooldown === 0;
	};
	self.fire = function (target) {
		if (self.canFire()) {
			var bullet = new Bullet(self.x, self.y, target);
			game.addChild(bullet);
			bullets.push(bullet);
			self.fireCooldown = self.fireRate;
		} else if (self.fireCooldown > 0) {
			self.fireCooldown--;
		}
	};
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000,
	//Init game with black background
	fps: 60
});

/**** 
* Game Code
****/ 
game.down = function (x, y, obj) {
	if (money >= 100) {
		var tower = new Tower();
		tower.x = x;
		tower.y = y;
		game.addChild(tower);
		towers.push(tower);
		money -= 100;
	}
};
var background = LK.getAsset('background', {
	anchorX: 0.5,
	anchorY: 0.5,
	x: 1024,
	y: 1366
});
game.addChild(background);
// Initialize arrays and variables
var towers = [];
var bullets = [];
var enemies = [];
var money = 100;
// Create and position towers
function createTowers() {
	var tower1 = new Tower();
	tower1.x = 500;
	tower1.y = 1366;
	game.addChild(tower1);
	towers.push(tower1);
	var tower2 = new Tower();
	tower2.x = 1500;
	tower2.y = 1366;
	game.addChild(tower2);
	towers.push(tower2);
}
// Spawn enemies at intervals
function spawnEnemy() {
	var enemy = new Enemy();
	enemy.x = 2010;
	enemy.y = 200;
	game.addChild(enemy);
	enemies.push(enemy);
}
// Create a road for the enemies to follow
function createRoad(x, y) {
	if (Array.isArray(x)) {
		for (var i = x[0]; i < x[1]; i += 100) {
			var roadBlock = LK.getAsset('road', {
				anchorX: 0.5,
				anchorY: 0.5,
				x: i,
				y: y
			});
			game.addChild(roadBlock);
		}
	} else {
		for (var i = y[0]; i < y[1]; i += 100) {
			var roadBlock = LK.getAsset('road', {
				anchorX: 0.5,
				anchorY: 0.5,
				x: x,
				y: i
			});
			game.addChild(roadBlock);
		}
	}
}
createRoad(2000, [200, 2601]);
createRoad([1000, 2000], 2601);
createRoad(1000, [200, 2601]);
createRoad([0, 1000], 200);
// Game update loop
game.update = function () {
	// Update towers
	towers.forEach(function (tower) {
		tower.update();
		enemies.forEach(function (enemy) {
			var dx = tower.x - enemy.x;
			var dy = tower.y - enemy.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (tower.canFire() && distance < tower.range) {
				tower.fire(enemy);
			}
		});
	});
	// Update bullets
	bullets.forEach(function (bullet) {
		bullet.update();
	});
	// Update enemies
	enemies.forEach(function (enemy) {
		enemy.update();
	});
	// Spawn enemies every 120 frames
	if (LK.ticks % 120 === 0) {
		spawnEnemy();
	}
	// Update the money text
	moneyText.setText('Money: ' + money);
};
// Initialize game elements
createTowers();
// Create a text object to display the amount of money
var moneyText = new Text2('Money: ' + money, {
	size: 50,
	fill: 0xFFFFFF
});
moneyText.anchor.set(0, 1); // Sets anchor to the bottom left corner of the text.
// Add the money text to the GUI overlay at the bottom left corner of the screen
LK.gui.bottomLeft.addChild(moneyText);

===================================================================
--- original.js
+++ change.js
@@ -129,13 +129,16 @@
 /**** 
 * Game Code
 ****/ 
 game.down = function (x, y, obj) {
-	var tower = new Tower();
-	tower.x = x;
-	tower.y = y;
-	game.addChild(tower);
-	towers.push(tower);
+	if (money >= 100) {
+		var tower = new Tower();
+		tower.x = x;
+		tower.y = y;
+		game.addChild(tower);
+		towers.push(tower);
+		money -= 100;
+	}
 };
 var background = LK.getAsset('background', {
 	anchorX: 0.5,
 	anchorY: 0.5,