/**** 
* Classes
****/ 
// Enemies below here.
var BalrogEnemy = Container.expand(function () {
	var self = Container.call(this);
	console.log('Balrog Spawned');
	var balrogGraphics = self.attachAsset('balrogSprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	balrogGraphics.scale.set(2.5);
	var healthBar = new HealthBar(300);
	healthBar.y = -balrogGraphics.height + 100;
	self.addChild(healthBar);
	self.healthBar = healthBar;
	self.healthBar.updateHealth(100);
	self.hitpoints = balrogHitpoints;
	self.maxHitpoints = balrogHitpoints;
	self.isDead = false;
	balrogHitpoints *= 2;
	self._move_migrated = function () {
		var minDist = Infinity;
		var closestTower = null;
		for (var i = 0; i < towers.length; i++) {
			var dx = towers[i].x - self.x;
			var dy = towers[i].y - self.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < minDist) {
				minDist = dist;
				closestTower = towers[i];
			}
		}
		if (closestTower && minDist < closestTower.width / 2 + self.width / 2) {
			//closestTower.health -= 4;
			closestTower.takeDamage(4);
			if (closestTower.health <= 0) {
				var towerIndex = towers.indexOf(closestTower);
				if (towerIndex > -1) {
					towers.splice(towerIndex, 1);
				}
				closestTower.destroy();
			}
		} else if (closestTower && minDist < 100) {
			var avoidanceForce = 8;
			var ax = self.x - closestTower.x;
			var ay = self.y - closestTower.y;
			var len = Math.sqrt(ax * ax + ay * ay);
			ax = ax / len * avoidanceForce;
			ay = ay / len * avoidanceForce;
			self.x += ax;
			self.y += ay;
		} else {
			self.zigzagCounter = self.zigzagCounter || 0;
			self.zigzagDirection = self.zigzagDirection || 1;
			if (self.zigzagCounter++ % self.zigzagTension === 0) {
				self.zigzagDirection *= -1;
			}
			self.x += 4 * self.zigzagDirection;
			self.y += 2;
			if (Math.random() < 0.01) {
				self.zigzagTension = Math.floor(Math.random() * 40) + 10;
			}
			if (self.x > 2048) {
				self.zigzagDirection = -1;
			}
			if (self.x < 0) {
				self.zigzagDirection = 1;
			}
			var scaleIncrement = (1 - 0.1) / 200;
			self.scale.x += scaleIncrement;
			self.scale.y += scaleIncrement;
			self.scale.x = Math.min(self.scale.x, 1);
			self.scale.y = Math.min(self.scale.y, 1);
			if (self.zigzagCounter % 10 == 0) {
				self.rotation = (0.5 - Math.random()) * (Math.PI * 2 / 100);
			}
		}
	};
	self.die = function () {
		playerGold += 500;
		playerScore += 10000;
		updateScoreLabel();
		updateGoldLabel();
		for (var i = 0; i < 100; i++) {
			var t = new GoldCoin(self.x, self.y, 150, 150, i * 2);
			game.addChild(t);
			goldCoins.push(t);
		}
		self.isDead = true;
	};
});
var Bullet = Container.expand(function (upgradeLevel) {
	var self = Container.call(this);
	//self.game = null;
	self.upgradeLevel = upgradeLevel;
	self.damage = towerDamage[self.upgradeLevel];
	self.isDead = false;
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	bulletGraphics.scale.set(0.2);
	var bulletGraphics1 = self.attachAsset('bulletSprite1', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var bulletGraphics2 = self.attachAsset('bulletSprite2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var bulletGraphics3 = self.attachAsset('bulletSprite3', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var bulletGraphics4 = self.attachAsset('bulletSprite4', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var bulletGraphics5 = self.attachAsset('bulletSprite5', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var bulletGraphics6 = self.attachAsset('bulletSprite6', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var bulletGraphics7 = self.attachAsset('bulletSprite7', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var bulletGraphics8 = self.attachAsset('bulletSprite8', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	bulletGraphics1.scale.set(.2);
	bulletGraphics2.scale.set(.2);
	bulletGraphics3.scale.set(.2);
	bulletGraphics4.scale.set(.2);
	bulletGraphics5.scale.set(.2);
	bulletGraphics6.scale.set(.2);
	bulletGraphics7.scale.set(.2);
	bulletGraphics8.scale.set(.2);
	bulletGraphics1.alpha = 0;
	bulletGraphics2.alpha = 0;
	bulletGraphics3.alpha = 0;
	bulletGraphics4.alpha = 0;
	bulletGraphics5.alpha = 0;
	bulletGraphics6.alpha = 0;
	bulletGraphics7.alpha = 0;
	bulletGraphics8.alpha = 0;
	var a = [bulletGraphics1, bulletGraphics2, bulletGraphics3, bulletGraphics4, bulletGraphics5, bulletGraphics6, bulletGraphics7, bulletGraphics8];
	if (self.upgradeLevel > 0) {
		bulletGraphics.alpha = 0;
		for (var i = 0; i < 8; i++) {
			if (i + 1 == self.upgradeLevel) {
				a[i].alpha = 1;
			} else {
				a[i].setAlpha = 0;
			}
		}
	}
	self.vx = 0;
	self.vy = 0;
	self._move_migrated = function () {
		if (self.target) {
			var tx = self.target.x - this.x;
			var ty = self.target.y - this.y;
			var dist = Math.sqrt(tx * tx + ty * ty);
			if (dist > 0) {
				self.x += self.vx * 10;
				self.y += self.vy * 10;
			}
			if (dist < self.width / 2 + self.target.width / 2) {
				self.hit();
			} else if (self.x < 0 || self.x > 2048 || self.y < 0 || self.y > 2732) {
				self.isDead = true;
			}
		}
	};
	self.hit = function () {
		self.target.hitpoints -= self.damage;
		self.target.healthBar.updateHealth(self.target.hitpoints / self.target.maxHitpoints * 100);
		if (self.target.hitpoints <= 0) {
			self.target.die();
		}
		self.isDead = true;
	};
});
var CityWall = Container.expand(function () {
	var self = Container.call(this);
	var wallGraphics = self.attachAsset('cityWallSprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(wallGraphics);
});
var DeathKnightEnemy = Container.expand(function () {
	var self = Container.call(this);
	console.log('DeathKnight Spawned');
	var dKnightGraphics = self.attachAsset('deathKnightSprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	dKnightGraphics.scale.set(2.5);
	var healthBar = new HealthBar(100);
	healthBar.y = -dKnightGraphics.height - 50;
	self.addChild(healthBar);
	self.healthBar = healthBar;
	self.healthBar.updateHealth(100);
	self.hitpoints = 100;
	self.maxHitpoints = 100;
	self.isDead = false;
	self._move_migrated = function () {
		var minDist = Infinity;
		var closestTower = null;
		for (var i = 0; i < towers.length; i++) {
			var dx = towers[i].x - self.x;
			var dy = towers[i].y - self.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < minDist) {
				minDist = dist;
				closestTower = towers[i];
			}
		}
		if (closestTower && minDist < closestTower.width / 2 + self.width / 2) {
			//closestTower.health -= 1;
			closestTower.takeDamage(1);
			if (closestTower.health <= 0) {
				var towerIndex = towers.indexOf(closestTower);
				if (towerIndex > -1) {
					towers.splice(towerIndex, 1);
				}
				closestTower.destroy();
			}
		} else if (closestTower && minDist < 100) {
			var avoidanceForce = 8;
			var ax = self.x - closestTower.x;
			var ay = self.y - closestTower.y;
			var len = Math.sqrt(ax * ax + ay * ay);
			ax = ax / len * avoidanceForce;
			ay = ay / len * avoidanceForce;
			self.x += ax;
			self.y += ay;
		} else {
			self.zigzagCounter = self.zigzagCounter || 0;
			self.zigzagDirection = self.zigzagDirection || 1;
			if (self.zigzagCounter++ % self.zigzagTension === 0) {
				self.zigzagDirection *= -1;
			}
			self.x += 4 * self.zigzagDirection;
			self.y += 2;
			if (Math.random() < 0.01) {
				self.zigzagTension = Math.floor(Math.random() * 40) + 10;
			}
			if (self.x > 2048) {
				self.zigzagDirection = -1;
			}
			if (self.x < 0) {
				self.zigzagDirection = 1;
			}
			var scaleIncrement = (1 - 0.1) / 200;
			self.scale.x += scaleIncrement;
			self.scale.y += scaleIncrement;
			self.scale.x = Math.min(self.scale.x, 1);
			self.scale.y = Math.min(self.scale.y, 1);
			if (self.zigzagCounter % 10 == 0) {
				self.rotation = (0.5 - Math.random()) * (Math.PI * 2 / 100);
			}
		}
	};
	self.die = function () {
		playerGold += 50;
		playerScore += 2222;
		updateScoreLabel();
		updateGoldLabel();
		for (var i = 0; i < 40; i++) {
			var t = new GoldCoin(self.x, self.y, 150, 150, i * 2);
			game.addChild(t);
			goldCoins.push(t);
		}
		self.isDead = true;
	};
});
var DragonEnemy = Container.expand(function () {
	var self = Container.call(this);
	console.log('Dragon Enemy Spawned');
	var enemyGraphics1 = self.attachAsset('dragonSprite1', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	enemyGraphics1.scale.set(1);
	var enemyGraphics2 = self.attachAsset('dragonSprite2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	enemyGraphics2.scale.set(1);
	enemyGraphics2.alpha = 0;
	/* 
	var dragonFire = new DragonFire();
	dragonFire.x = -100;
	dragonFire.y = 80;
	self.addChild(dragonFire);
	self.dragonFire = dragonFire;
	*/ 
	var healthBar = new HealthBar();
	healthBar.y = -enemyGraphics1.height + 180;
	self.addChild(healthBar);
	self.healthBar = healthBar;
	self.healthBar.updateHealth(100);
	self.healthBar.alpha = 0;
	self.hitpoints = 6000;
	self.maxHitpoints = 6000;
	self.isDead = false;
	self.zigzagTension = 400;
	self.zigzagDirection = 1;
	self.flying = true;
	self._move_migrated = function () {
		var minDist = Infinity;
		var closestTower = null;
		for (var i = 0; i < towers.length; i++) {
			var dx = towers[i].x - self.x;
			var dy = towers[i].y - self.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < minDist) {
				minDist = dist;
				closestTower = towers[i];
			}
		}
		if (closestTower && minDist < closestTower.width / 2 + self.width / 2) {
			//closestTower.health -= 0.5;
			closestTower.takeDamage(7);
			if (closestTower.health <= 0) {
				var towerIndex = towers.indexOf(closestTower);
				if (towerIndex > -1) {
					towers.splice(towerIndex, 1);
				}
				closestTower.destroy();
			}
		}
		self.zigzagCounter = self.zigzagCounter || 0;
		//self.zigzagDirection = self.zigzagDirection || 1;
		if (self.zigzagCounter++ % self.zigzagTension === 0) {
			if (self.y < 1800) {
				self.zigzagDirection *= -1;
			}
		}
		self.x += 4 * self.zigzagDirection;
		if (self.y < 1800) {
			self.y += 2;
		}
		/* 
		if (Math.random() < 0.005) {
			self.zigzagTension = Math.floor(Math.random() * 380) + 20;
		}*/ 
		if (self.x > 2048) {
			if (self.y < 1800) {
				self.zigzagDirection = -1;
			} else {
				if (self.x > 2448) {
					self.isDead = true;
				}
			}
		}
		if (self.x < 0) {
			if (self.y < 1800) {
				self.zigzagDirection = 1;
			} else {
				if (self.x < -400) {
					self.isDead = true;
				}
			}
		}
		var scaleIncrement = (1 - 0.1) / 200;
		self.scale.x += scaleIncrement;
		self.scale.y += scaleIncrement;
		self.scale.x = Math.min(self.scale.x, 1);
		self.scale.y = Math.min(self.scale.y, 1);
		if (self.zigzagCounter++ % self.zigzagTension === 0) {
			self.zigzagDirection *= -1;
		}
		if (self.zigzagCounter % 5 == 0) {
			self.rotation = (0.5 - Math.random()) * (Math.PI * 2 / 50);
		}
		if (self.zigzagDirection == 1) {
			//self.removeChild(self.graphics);
			//self.graphics = enemyGraphics1;
			//self.addChild(self.graphics);
			enemyGraphics2.alpha = 0;
			enemyGraphics1.alpha = 1;
			//self.dragonFire.scale.x = -1;
			//self.dragonFire.x = 100;
		} else {
			//self.removeChild(self.graphics);
			//self.graphics = enemyGraphics2;
			//self.addChild(self.graphics);
			enemyGraphics1.alpha = 0;
			enemyGraphics2.alpha = 1;
			//self.dragonFire.scale.x = 1;
			//self.dragonFire.x = -100;
		}
		/* 
		// Check for damage to towers
		var minDist = Infinity;
		var closestTower = null;
		for (var i = 0; i < towers.length; i++) {
			var dfx = self.x + self.zigzagDirection == 1 ? 300 : -300;
			var dfy = self.y + 250;
			//var dx = towers[i].x - self.x + dragonFire.x;
			//var dy = towers[i].y - self.y + dragonFire.y;
			var dx = towers[i].x - dfx;
			var dy = towers[i].y - dfy;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < minDist) {
				minDist = dist;
				closestTower = towers[i];
			}
		}
		//if (closestTower && minDist < closestTower.width / 2 + self.width / 2) {
		if (closestTower && minDist < 800) {
			//closestTower.health -= 0.5;
			closestTower.takeDamage(10);
			if (closestTower.health <= 0) {
				var towerIndex = towers.indexOf(closestTower);
				if (towerIndex > -1) {
					towers.splice(towerIndex, 1);
				}
				closestTower.destroy();
			}
		}*/ 
	};
	self.die = function () {
		playerGold += 10;
		playerScore += 150;
		updateScoreLabel();
		updateGoldLabel();
		for (var i = 0; i < 8; i++) {
			var t = new GoldCoin(self.x, self.y, 150, 150, i * 2);
			game.addChild(t);
			goldCoins.push(t);
		}
		self.isDead = true;
	};
});
var DragonFire = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('dragonFire', {
		anchorX: 1,
		anchorY: 0
	});
	self.update = function () {
		this.scale.x += 0.2 - Math.random() * 0.4;
	};
});
// Goblin,
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	console.log('Standard Enemy Spawned');
	var enemyGraphics = self.attachAsset('enemySprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	enemyGraphics.scale.set(0.8);
	var healthBar = new HealthBar(3);
	healthBar.y = -enemyGraphics.height + 40;
	self.addChild(healthBar);
	self.healthBar = healthBar;
	self.healthBar.updateHealth(100);
	self.isDead = false;
	self.hitpoints = 3;
	self.maxHitpoints = 3;
	self.zigzagTension = Math.floor(Math.random() * 40) + 10;
	self._move_migrated = function () {
		//console.log('Enemy move');
		var minDist = Infinity;
		var closestTower = null;
		for (var i = 0; i < towers.length; i++) {
			var dx = towers[i].x - self.x;
			var dy = towers[i].y - self.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < minDist) {
				minDist = dist;
				closestTower = towers[i];
			}
		}
		if (closestTower && minDist < closestTower.width / 2 + self.width / 2) {
			//closestTower.health -= 0.5;
			closestTower.takeDamage(0.5);
			if (closestTower.health <= 0) {
				var towerIndex = towers.indexOf(closestTower);
				if (towerIndex > -1) {
					towers.splice(towerIndex, 1);
				}
				closestTower.destroy();
			}
		} else if (closestTower && minDist < 100) {
			var avoidanceForce = 8;
			var ax = self.x - closestTower.x;
			var ay = self.y - closestTower.y;
			var len = Math.sqrt(ax * ax + ay * ay);
			ax = ax / len * avoidanceForce;
			ay = ay / len * avoidanceForce;
			self.x += ax;
			self.y += ay;
		} else {
			self.zigzagCounter = self.zigzagCounter || 0;
			self.zigzagDirection = self.zigzagDirection || 1;
			if (self.zigzagCounter++ % self.zigzagTension === 0) {
				self.zigzagDirection *= -1;
			}
			self.x += 4 * self.zigzagDirection;
			self.y += 2;
			if (Math.random() < 0.01) {
				self.zigzagTension = Math.floor(Math.random() * 40) + 10;
			}
			if (self.x > 2048) {
				self.zigzagDirection = -1;
			}
			if (self.x < 0) {
				self.zigzagDirection = 1;
			}
			var scaleIncrement = (1 - 0.1) / 200;
			self.scale.x += scaleIncrement;
			self.scale.y += scaleIncrement;
			self.scale.x = Math.min(self.scale.x, 1);
			self.scale.y = Math.min(self.scale.y, 1);
			self.rotation = (0.5 - Math.random()) * (Math.PI * 2 / 50);
		}
	};
	self.die = function () {
		playerGold += 5;
		playerScore += 100;
		updateScoreLabel();
		updateGoldLabel();
		for (var i = 0; i < 5; i++) {
			var t = new GoldCoin(self.x, self.y, 150, 150, i * 2);
			game.addChild(t);
			goldCoins.push(t);
		}
		self.isDead = true;
	};
});
var FlyingEnemy = Container.expand(function () {
	var self = Container.call(this);
	console.log('Flying Enemy Spawned');
	var enemyGraphics1 = self.attachAsset('flyingEnemySprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	enemyGraphics1.scale.set(1);
	var enemyGraphics2 = self.attachAsset('flyingEnemySprite2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	enemyGraphics2.scale.set(1);
	var healthBar = new HealthBar(6);
	healthBar.y = -enemyGraphics1.height + 20;
	self.addChild(healthBar);
	self.healthBar = healthBar;
	self.healthBar.updateHealth(100);
	self.hitpoints = 6;
	self.maxHitpoints = 6;
	self.isDead = false;
	self.zigzagTension = 400;
	self.flying = true;
	self._move_migrated = function () {
		self.zigzagCounter = self.zigzagCounter || 0;
		self.zigzagDirection = self.zigzagDirection || 1;
		if (self.zigzagCounter++ % self.zigzagTension === 0) {
			self.zigzagDirection *= -1;
		}
		self.x += 4 * self.zigzagDirection;
		self.y += 2;
		if (Math.random() < 0.005) {
			self.zigzagTension = Math.floor(Math.random() * 380) + 20;
		}
		if (self.x > 2048) {
			self.zigzagDirection = -1;
		}
		if (self.x < 0) {
			self.zigzagDirection = 1;
		}
		var scaleIncrement = (1 - 0.1) / 200;
		self.scale.x += scaleIncrement;
		self.scale.y += scaleIncrement;
		self.scale.x = Math.min(self.scale.x, 1);
		self.scale.y = Math.min(self.scale.y, 1);
		if (self.zigzagCounter++ % self.zigzagTension === 0) {
			self.zigzagDirection *= -1;
		}
		if (self.zigzagCounter % 5 == 0) {
			self.rotation = (0.5 - Math.random()) * (Math.PI * 2 / 50);
		}
		if (self.zigzagDirection == 1) {
			self.removeChild(self.graphics);
			self.graphics = enemyGraphics1;
			self.addChild(self.graphics);
		} else {
			self.removeChild(self.graphics);
			self.graphics = enemyGraphics2;
			self.addChild(self.graphics);
		}
	};
	self.die = function () {
		playerGold += 10;
		playerScore += 150;
		updateScoreLabel();
		updateGoldLabel();
		for (var i = 0; i < 8; i++) {
			var t = new GoldCoin(self.x, self.y, 150, 150, i * 2);
			game.addChild(t);
			goldCoins.push(t);
		}
		self.isDead = true;
	};
});
var GoldCoin = Container.expand(function (startX, startY, endX, endY, delay) {
	var self = Container.call(this);
	GoldCoin.delayIncrement = 0;
	//self.game = this;
	var coinGraphics = self.attachAsset('goldCoinSprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(coinGraphics);
	self.x = startX;
	self.y = startY;
	self.isDead = false;
	var distance = Math.sqrt(Math.pow(endX - startX, 2) + Math.pow(endY - startY, 2));
	self.delayCounter = delay * 2;
	var duration = 60 + delay;
	var vx = (endX - startX) / duration;
	var vy = (endY - startY) / duration;
	self.alpha = 0;
	self.path = createQuadraticBezierArcPoints(startX, startY, endX, startY - 100, endX, endY, 60);
	self._move_migrated = function () {
		if (self.delayCounter > 0) {
			self.delayCounter--;
		} else {
			self.alpha = 1;
			if (self.path[duration]) {
				self.x = self.path[duration - self.delayCounter][0];
				self.y = self.path[duration - self.delayCounter][1];
			}
		}
		if (--duration <= 0) {
			//self.destroy();
			self.isDead = true;
		}
	};
});
var HealthBar = Container.expand(function (maxHealth) {
	var self = Container.call(this);
	var healthBarGraphics = self.attachAsset('healthBar', {
		anchorX: 0.5,
		anchorY: 1
	});
	self.maxHealth = maxHealth;
	self.maxWidth;
	if (self.maxHealth == 3) {
		//healthBarGraphics.width *= 0.3;
		self.maxWidth = 50;
	} else if (self.maxHealth == 6) {
		//healthBarGraphics.width *= 0.6;
		self.maxWidth = 100;
	} else if (self.maxHealth == 30) {
		self.maxWidth = 150;
	} else if (self.maxHealth == 100) {
		self.maxWidth = 200;
	} else {
		self.maxWidth = 300;
	}
	/* 
	self.setTint = function (tint) {
		healthBarGraphics.tint = tint;
	};*/ 
	//self.setTint(0x00FF00);
	self.updateHealth = function (health) {
		//self.scale.set(health / 100, 1);
		//self.scale.set(health / self.maxHealth * (self.maxWidth / 100), 1);
		//self.scale.set(health / self.maxHealth * (self.maxWidth / 100), 1);
		self.scale.set(health / 100 * (self.maxWidth / 100), 1);
	};
});
var HealthBarTower = Container.expand(function () {
	var self = Container.call(this);
	var healthBarGraphics = self.attachAsset('healthBarTower', {
		anchorX: 0.5,
		anchorY: 1
	});
	/* 
	self.setTint = function (tint) {
		healthBarGraphics.tint = tint;
	};*/ 
	//self.setTint(0x00FF00);
	self.updateHealth = function (health) {
		self.scale.set(health, 1);
	};
});
var OrcEnemy = Container.expand(function () {
	var self = Container.call(this);
	console.log('Orc Spawned');
	var enemyGraphics = self.attachAsset('orcEnemySprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	enemyGraphics.scale.set(0.8);
	var healthBar = new HealthBar(6);
	healthBar.y = -enemyGraphics.height + 100;
	self.addChild(healthBar);
	self.healthBar = healthBar;
	self.healthBar.updateHealth(100);
	self.hitpoints = 6;
	self.maxHitpoints = 6;
	self.isDead = false;
	self.zigzagTension = Math.floor(Math.random() * 20) + 10;
	self._move_migrated = function () {
		var minDist = Infinity;
		var closestTower = null;
		for (var i = 0; i < towers.length; i++) {
			var dx = towers[i].x - self.x;
			var dy = towers[i].y - self.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < minDist) {
				minDist = dist;
				closestTower = towers[i];
			}
		}
		if (closestTower && minDist < closestTower.width / 2 + self.width / 2) {
			//closestTower.health -= 0.8;
			closestTower.takeDamage(0.8);
			if (closestTower.health <= 0) {
				var towerIndex = towers.indexOf(closestTower);
				if (towerIndex > -1) {
					towers.splice(towerIndex, 1);
				}
				closestTower.destroy();
			}
		} else if (closestTower && minDist < 100) {
			var avoidanceForce = 8;
			var ax = self.x - closestTower.x;
			var ay = self.y - closestTower.y;
			var len = Math.sqrt(ax * ax + ay * ay);
			ax = ax / len * avoidanceForce;
			ay = ay / len * avoidanceForce;
			self.x += ax;
			self.y += ay;
		} else {
			self.zigzagCounter = self.zigzagCounter || 0;
			self.zigzagDirection = self.zigzagDirection || 1;
			if (self.zigzagCounter++ % self.zigzagTension === 0) {
				self.zigzagDirection *= -1;
			}
			self.x += 4 * self.zigzagDirection;
			self.y += 2;
			if (Math.random() < 0.01) {
				self.zigzagTension = Math.floor(Math.random() * 40) + 10;
			}
			if (self.x > 2048) {
				self.zigzagDirection = -1;
			}
			if (self.x < 0) {
				self.zigzagDirection = 1;
			}
			var scaleIncrement = (1 - 0.1) / 200;
			self.scale.x += scaleIncrement;
			self.scale.y += scaleIncrement;
			self.scale.x = Math.min(self.scale.x, 1);
			self.scale.y = Math.min(self.scale.y, 1);
			if (self.zigzagCounter % 5 == 0) {
				self.rotation = (0.5 - Math.random()) * (Math.PI * 2 / 100);
			}
		}
	};
	self.die = function () {
		playerGold += 10;
		playerScore += 150;
		updateScoreLabel();
		updateGoldLabel();
		for (var i = 0; i < 8; i++) {
			var t = new GoldCoin(self.x, self.y, 150, 150, i * 2);
			game.addChild(t);
			goldCoins.push(t);
		}
		self.isDead = true;
	};
});
var Tower = Container.expand(function (towerLevel) {
	var self = Container.call(this);
	self.towerLevel = towerLevel || 0;
	self.towerData = towerLevels[self.towerLevel];
	var towerGraphics = self.attachAsset('towerSprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerGraphics1 = self.attachAsset('towerSprite1', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerGraphics2 = self.attachAsset('towerSprite2', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerGraphics3 = self.attachAsset('towerSprite3', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerGraphics4 = self.attachAsset('towerSprite4', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerGraphics5 = self.attachAsset('towerSprite5', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerGraphics6 = self.attachAsset('towerSprite6', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerGraphics7 = self.attachAsset('towerSprite7', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var towerGraphics8 = self.attachAsset('towerSprite8', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	towerGraphics.scale.set(2);
	towerGraphics1.scale.set(2);
	towerGraphics2.scale.set(2);
	towerGraphics3.scale.set(2);
	towerGraphics4.scale.set(2);
	towerGraphics5.scale.set(2);
	towerGraphics6.scale.set(2);
	towerGraphics7.scale.set(2);
	towerGraphics8.scale.set(2);
	towerGraphics1.alpha = 0;
	towerGraphics2.alpha = 0;
	towerGraphics3.alpha = 0;
	towerGraphics4.alpha = 0;
	towerGraphics5.alpha = 0;
	towerGraphics6.alpha = 0;
	towerGraphics7.alpha = 0;
	towerGraphics8.alpha = 0;
	var a = [towerGraphics1, towerGraphics2, towerGraphics3, towerGraphics4, towerGraphics5, towerGraphics6, towerGraphics7, towerGraphics8];
	// Show correct sprite based on tower level
	towerGraphics.alpha = 0;
	towerGraphics1.alpha = 0;
	towerGraphics2.alpha = 0;
	towerGraphics3.alpha = 0;
	towerGraphics4.alpha = 0;
	towerGraphics5.alpha = 0;
	towerGraphics6.alpha = 0;
	towerGraphics7.alpha = 0;
	towerGraphics8.alpha = 0;
	if (self.towerLevel === 0) {
		towerGraphics1.alpha = 1;
	} else if (self.towerLevel === 1) {
		towerGraphics2.alpha = 1;
	} else if (self.towerLevel === 2) {
		towerGraphics3.alpha = 1;
	} else if (self.towerLevel === 3) {
		towerGraphics4.alpha = 1;
	} else if (self.towerLevel === 4) {
		towerGraphics5.alpha = 1;
	} else {
		towerGraphics1.alpha = 1;
	}
	var healthBar = new HealthBarTower();
	healthBar.y = towerGraphics.height;
	self.addChild(healthBar);
	self.healthBar = healthBar;
	self.healthBar.updateHealth(1);
	self.shoot = function (enemies) {
		if (self.shootCounter++ % (self.towerData.fireRate || 50) === 0) {
			for (var i = 0; i < enemies.length; i++) {
				var enemy = enemies[i];
				var dx = enemy.x - self.x;
				var dy = enemy.y - self.y;
				var distance = Math.sqrt(dx * dx + dy * dy);
				if (distance <= (self.towerData.range || 300)) {
					//console.log('shot');
					var bulletLevel = self.towerLevel + 1;
					var bullet = new Bullet(bulletLevel);
					bullet.damage = self.towerData.damage || 1;
					bullet.x = self.x;
					bullet.y = self.y;
					bullet.target = enemy;
					var tx = bullet.target.x - bullet.x;
					var ty = bullet.target.y - bullet.y;
					var rad = Math.atan2(ty, tx);
					bullet.rotation = rad + Math.PI / 2;
					bullet.vx = Math.cos(rad);
					bullet.vy = Math.sin(rad);
					addBullet(bullet);
					break;
				}
			}
		}
	};
	self.upgrade = function () {};
	self.takeDamage = function (dam) {
		self.health -= dam;
		self.healthBar.updateHealth(self.health / self.maxHealth);
	};
	self.shootCounter = 0;
	self.health = 200;
	self.maxHealth = 200;
});
var TreasureChest = Container.expand(function () {
	var self = Container.call(this);
	var chestGraphics = self.attachAsset('treasureChestSprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(chestGraphics);
});
var TrollEnemy = Container.expand(function () {
	var self = Container.call(this);
	console.log('Troll Spawned');
	var trollGraphics = self.attachAsset('trollSprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	trollGraphics.scale.set(2.5);
	var healthBar = new HealthBar(30);
	healthBar.y = -trollGraphics.height - 40;
	self.addChild(healthBar);
	self.healthBar = healthBar;
	self.healthBar.updateHealth(100);
	self.hitpoints = 30;
	self.maxHitpoints = 30;
	self.isDead = false;
	self._move_migrated = function () {
		var minDist = Infinity;
		var closestTower = null;
		for (var i = 0; i < towers.length; i++) {
			var dx = towers[i].x - self.x;
			var dy = towers[i].y - self.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			if (dist < minDist) {
				minDist = dist;
				closestTower = towers[i];
			}
		}
		if (closestTower && minDist < closestTower.width / 2 + self.width / 2) {
			//closestTower.health -= 0.5;
			closestTower.takeDamage(0.5);
			if (closestTower.health <= 0) {
				var towerIndex = towers.indexOf(closestTower);
				if (towerIndex > -1) {
					towers.splice(towerIndex, 1);
				}
				closestTower.destroy();
			}
		} else if (closestTower && minDist < 100) {
			var avoidanceForce = 8;
			var ax = self.x - closestTower.x;
			var ay = self.y - closestTower.y;
			var len = Math.sqrt(ax * ax + ay * ay);
			ax = ax / len * avoidanceForce;
			ay = ay / len * avoidanceForce;
			self.x += ax;
			self.y += ay;
		} else {
			self.zigzagCounter = self.zigzagCounter || 0;
			self.zigzagDirection = self.zigzagDirection || 1;
			if (self.zigzagCounter++ % self.zigzagTension === 0) {
				self.zigzagDirection *= -1;
			}
			self.x += 4 * self.zigzagDirection;
			self.y += 2;
			if (Math.random() < 0.01) {
				self.zigzagTension = Math.floor(Math.random() * 40) + 10;
			}
			if (self.x > 2048) {
				self.zigzagDirection = -1;
			}
			if (self.x < 0) {
				self.zigzagDirection = 1;
			}
			var scaleIncrement = (1 - 0.1) / 200;
			self.scale.x += scaleIncrement;
			self.scale.y += scaleIncrement;
			self.scale.x = Math.min(self.scale.x, 1);
			self.scale.y = Math.min(self.scale.y, 1);
			if (self.zigzagCounter % 5 == 0) {
				self.rotation = (0.5 - Math.random()) * (Math.PI * 2 / 100);
			}
		}
	};
	self.die = function () {
		playerGold += 20;
		playerScore += 300;
		updateScoreLabel();
		updateGoldLabel();
		for (var i = 0; i < 20; i++) {
			var t = new GoldCoin(self.x, self.y, 150, 150, i * 2);
			game.addChild(t);
			goldCoins.push(t);
		}
		self.isDead = true;
	};
});
var UpgradeButton = Container.expand(function () {
	var self = Container.call(this);
	var upgradeButtonGraphics = self.attachAsset('buttonSprite', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(upgradeButtonGraphics);
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x000000,
	name: 'Monster Defense'
});

/**** 
* Game Code
****/ 
var playerGold = 30; // TODO: Reset to 30;
var playerScore = 0;
var enemySpawnDelay = 120;
var upgradeLevel = 0;
var towerDamage = [1, 1.5, 2, 2.5, 3, 3.5, 4, 5, 8];
var towerShotDelay = [50, 45, 45, 40, 35, 30, 25, 20, 15];
var balrogHitpoints = 500;
var towers = [];
var enemies = [];
var bullets = [];
var goldCoins = [];
var enemySpawnCounter = 0;
var totalEnemiesSpawned = 0;
var towerLevels = [{
	name: 'Basic Tower',
	cost: 10,
	damage: 1,
	range: 300,
	fireRate: 50
}, {
	name: 'Advanced Tower',
	cost: 20,
	damage: 2,
	range: 350,
	fireRate: 45
}, {
	name: 'Elite Tower',
	cost: 40,
	damage: 3,
	range: 400,
	fireRate: 40
}, {
	name: 'Master Tower',
	cost: 80,
	damage: 4,
	range: 450,
	fireRate: 35
}, {
	name: 'Legendary Tower',
	cost: 160,
	damage: 6,
	range: 500,
	fireRate: 30
}];
;
var lerp = function lerp(start, end, t) {
	return start * (1 - t) + end * t;
};
var createQuadraticBezierArcPoints = function createQuadraticBezierArcPoints(p0x, p0y, p1x, p1y, p2x, p2y, numberOfSteps) {
	var points_along_axis = new Array(numberOfSteps).fill(null).map(function () {
		return [0, 0];
	});
	var stepping_constant = 1 / numberOfSteps;
	for (var i = 0; i < numberOfSteps; i++) {
		var i_p0_p1x = lerp(p0x, p1x, i * stepping_constant);
		var i_p0_p1y = lerp(p0y, p1y, i * stepping_constant);
		var i_p1_p2x = lerp(p1x, p2x, i * stepping_constant);
		var i_p1_p2y = lerp(p1y, p2y, i * stepping_constant);
		if (false) {
			points_along_axis.push(lerp(i_p0_p1x, i_p1_p2x, i * stepping_constant), lerp(i_p0_p1y, i_p1_p2y, i * stepping_constant));
		}
		points_along_axis[i][0] = lerp(i_p0_p1x, i_p1_p2x, i * stepping_constant);
		points_along_axis[i][1] = lerp(i_p0_p1y, i_p1_p2y, i * stepping_constant);
	}
	if (false) {
		console.log('path: ' + points_along_axis);
		console.log('path[2]: ' + points_along_axis[2]);
	}
	return points_along_axis.reverse();
};
var temp = createQuadraticBezierArcPoints(0, 0, 50, 50, 0, 50, 10);
var updateGoldLabel = function updateGoldLabel() {
	goldLabel.setText('Gold: ' + playerGold);
	updateTowerMenuButtons();
};
var updateScoreLabel = function updateScoreLabel() {
	scoreLabel.setText('Score: ' + playerScore);
};
var updateLevelLabel = function updateLevelLabel() {
	var currentLevel = Math.floor(totalEnemiesSpawned / 20) + 1;
	levelLabel.setText('Level: ' + currentLevel);
};
var addBullet = function addBullet(bullet) {
	bullets.push(bullet);
	game.addChild(bullet);
};
function sufficientDistanceToOtherTowers(position) {
	console.log('sufficientDistanceToOtherTowers');
	for (var i = 0; i < towers.length; i++) {
		var tower = towers[i];
		var dx = tower.x - position.x;
		var dy = tower.y - position.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 120) {
			return false;
		}
	}
	return true;
}
;
var background = game.attachAsset('background', {});
background.width = 2048;
background.height = 2732;
background.y = 0;
game.addChildAt(background, 0);
var initialEnemy = new Enemy();
initialEnemy.x = 300 + Math.random() * (1848 - 300);
initialEnemy.y = 200;
initialEnemy.scale.set(0.1);
enemies.push(initialEnemy);
game.addChild(initialEnemy);
var cityWall = game.addChild(new CityWall());
cityWall.y = 2632;
cityWall.x = 332;
cityWall.scale.y = 0.5;
cityWall.scale.x = 0.5;
var cityWall2 = game.addChild(new CityWall());
cityWall2.y = 2632;
cityWall2.x = 1012;
cityWall2.scale.y = 0.5;
cityWall2.scale.x = 0.5;
var cityWall3 = game.addChild(new CityWall());
cityWall3.y = 2632;
cityWall3.x = 1691;
cityWall3.scale.y = 0.5;
cityWall3.scale.x = 0.5;
var bottomBlackBox = game.attachAsset('blackBox', {
	anchorY: 1
});
bottomBlackBox.width = 2048;
bottomBlackBox.height = 400;
bottomBlackBox.y = 2732;
game.addChild(bottomBlackBox);
var goldLabel = new Text2('Gold: 30', {
	size: 100,
	fill: '#ffd700',
	align: 'left',
	dropShadow: true
});
goldLabel.x = 270;
goldLabel.y = 120;
game.addChild(goldLabel);
var scoreLabel = new Text2('Score: 0', {
	size: 100,
	fill: '#ccbbff',
	align: 'left',
	dropShadow: true
});
scoreLabel.x = 700;
scoreLabel.y = 120;
game.addChild(scoreLabel);
var levelLabel = new Text2('Level: 1', {
	size: 100,
	fill: '#ffaa33',
	align: 'left',
	dropShadow: true
});
levelLabel.x = 1500;
levelLabel.y = 120;
game.addChild(levelLabel);
var selectedTowerLevel = 0;
var towerMenuButtons = [];
// Create tower selection menu
for (var i = 0; i < towerLevels.length; i++) {
	var towerButton = new Container();
	// Create button background
	var buttonBg = LK.getAsset('buttonSprite', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.8,
		scaleY: 0.8
	});
	towerButton.addChild(buttonBg);
	// Add tower sprite preview
	var towerSpriteName = 'towerSprite' + (i + 1);
	var towerPreview = LK.getAsset(towerSpriteName, {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.8,
		scaleY: 0.8
	});
	towerButton.addChild(towerPreview);
	// Add cost text
	var costText = new Text2(towerLevels[i].cost + 'g', {
		size: 30,
		fill: '#ffd700',
		align: 'center'
	});
	costText.anchor.set(0.5, 0);
	costText.x = 0;
	costText.y = 40;
	towerButton.addChild(costText);
	// Add level text
	var levelText = new Text2('Lv' + (i + 1), {
		size: 25,
		fill: '#ffffff',
		align: 'center'
	});
	levelText.anchor.set(0.5, 1);
	levelText.x = 0;
	levelText.y = -40;
	towerButton.addChild(levelText);
	// Position buttons
	towerButton.x = 150 + i * 120;
	towerButton.y = 2550;
	// Store references
	towerButton.towerLevel = i;
	towerButton.buttonBg = buttonBg;
	towerButton.costText = costText;
	// Add click handler
	towerButton.down = function (x, y, obj) {
		selectedTowerLevel = this.towerLevel;
		updateTowerMenuButtons();
	};
	towerMenuButtons.push(towerButton);
	game.addChild(towerButton);
}
function updateTowerMenuButtons() {
	for (var i = 0; i < towerMenuButtons.length; i++) {
		var button = towerMenuButtons[i];
		if (button && button.buttonBg) {
			// Reset all buttons
			button.buttonBg.tint = 0xffffff;
			button.alpha = playerGold >= towerLevels[i].cost ? 1.0 : 0.5;
			// Highlight selected button
			if (i === selectedTowerLevel) {
				button.buttonBg.tint = 0x00ff00;
			}
		}
	}
}
// Initialize menu
updateTowerMenuButtons();
var treasureChest = game.addChild(new TreasureChest());
treasureChest.scale.x = 1.3;
treasureChest.scale.y = 1.3;
treasureChest.x = 150;
treasureChest.y = 150;
// Main game loop and click handler below here.
LK.on('tick', function () {
	//console.log('tick:' + LK.ticks);
	enemySpawnCounter = enemySpawnCounter || 0;
	totalEnemiesSpawned = totalEnemiesSpawned || 0;
	if (++enemySpawnCounter >= enemySpawnDelay) {
		var newEnemy;
		if (totalEnemiesSpawned > 200 && totalEnemiesSpawned % 199 == 0) {
			newEnemy = new BalrogEnemy();
		} else if (totalEnemiesSpawned > 100 && totalEnemiesSpawned % 99 == 0) {
			newEnemy = new DragonEnemy();
		} else if (totalEnemiesSpawned > 3 && totalEnemiesSpawned % 50 == 0) {
			newEnemy = new DeathKnightEnemy();
		} else if (totalEnemiesSpawned > 3 && totalEnemiesSpawned % 10 == 0) {
			newEnemy = new TrollEnemy();
		} else {
			if (Math.random() < 0.2 + upgradeLevel * 0.06) {
				newEnemy = new OrcEnemy();
			} else {
				if (Math.random() < 0.5) {
					newEnemy = new FlyingEnemy();
					//newEnemy = new DragonEnemy();
				} else {
					newEnemy = new Enemy();
				}
			}
		}
		if (newEnemy) {
			newEnemy.x = 300 + Math.random() * (1848 - 300);
			newEnemy.y = 200;
			newEnemy.scale.set(0.1);
			enemies.push(newEnemy);
			game.addChild(newEnemy);
		}
		totalEnemiesSpawned++;
		if (totalEnemiesSpawned > 0 && totalEnemiesSpawned % 20 == 0) {
			enemySpawnDelay -= 4;
			if (enemySpawnDelay < 20) {
				enemySpawnDelay = 20;
			}
			updateLevelLabel();
		}
		enemySpawnCounter = 0;
	}
	//console.log('enemies length:' + enemies.length);
	for (var i = enemies.length - 1; i >= 0; i--) {
		if (enemies[i].isDead) {
			enemies[i].destroy();
			enemies.splice(i, 1);
		} else {
			enemies[i]._move_migrated();
			if (enemies[i].y >= 2332 - enemies[i].height / 2) {
				/* 
				var finalScoreLabel = new Text2('*** Your Final Score: ' + playerScore + ' ***', {
					size: 120,
					fill: '#ffffff',
					align: 'left',
					dropShadow: true
				});
				finalScoreLabel.x = 1024 - finalScoreLabel.width / 2;
				finalScoreLabel.y = 260;
				game.addChild(finalScoreLabel);
				'*/
				LK.setScore(playerScore);
				LK.showGameOver();
			}
		}
	}
	//console.log('towers length:' + towers.length);
	for (var j = 0; j < towers.length; j++) {
		towers[j].shoot(enemies);
	}
	//console.log('bullets length:' + bullets.length);
	for (var k = bullets.length - 1; k >= 0; k--) {
		if (bullets[k].isDead) {
			bullets[k].destroy();
			bullets.splice(k, 1);
		} else {
			bullets[k]._move_migrated();
		}
	}
	//console.log('goldCoins length:' + goldCoins.length);
	for (var l = goldCoins.length - 1; l >= 0; l--) {
		if (goldCoins[l].isDead) {
			goldCoins[l].destroy();
			goldCoins.splice(l, 1);
		} else {
			goldCoins[l]._move_migrated();
		}
	}
	if (LK.ticks % 10 == 0) {
		sortDepths();
	}
});
function sortDepths() {
	var en = enemies.filter(function (el) {
		return !el.flying;
	});
	var a = [].concat(towers, en);
	a.sort(function (a, b) {
		return a.y - b.y;
	});
	a.forEach(function (e, index) {
		game.addChildAt(e, 6 + index);
		//console.log('y and zIndex:' + e.y + ', ' + e.parent.getChildIndex(e));
	});
}
;
game.on('down', function (x, y, obj) {
	//console.log('game on down, position:' + obj.event.getLocalPosition(game).x + ',' + obj.event.getLocalPosition(game).y);
	var position = game.toLocal(obj.global);
	if (position.y >= 600 && position.y <= 2112) {
		// Use selected tower level from menu
		var selectedTower = towerLevels[selectedTowerLevel];
		if (selectedTower && playerGold >= selectedTower.cost) {
			if (sufficientDistanceToOtherTowers(position)) {
				playerGold -= selectedTower.cost;
				var newTower = game.addChild(new Tower(selectedTowerLevel));
				newTower.x = position.x;
				newTower.y = position.y;
				towers.push(newTower);
				sortDepths();
				/* 
				towers.sort(function (a, b) {
				return a.y - b.y;
				});
				towers.forEach(function (tower, index) {
				game.addChildAt(tower, 6 + index);
				console.log('y and zIndex:' + tower.y + ', ' + tower.parent.getChildIndex(tower));
				});
				*/ 
				updateGoldLabel();
			}
		}
	}
});

===================================================================
--- original.js
+++ change.js
@@ -1252,17 +1252,8 @@
 			}
 		}
 	}
 }
-var instructionLabel = new Text2("Select tower type below, then tap to build!\nDon't let enemies reach the City Wall!", {
-	size: 50,
-	fill: '#eeeeee',
-	align: 'left',
-	dropShadow: true
-});
-instructionLabel.x = 920;
-instructionLabel.y = 2632 - bottomBlackBox.height + 50;
-game.addChild(instructionLabel);
 // Initialize menu
 updateTowerMenuButtons();
 var treasureChest = game.addChild(new TreasureChest());
 treasureChest.scale.x = 1.3;