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

/**** 
* Classes
****/ 
var AreaTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('enemyTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	towerGraphics.tint = 0xff6600; // Orange color for area tower
	towerGraphics.scaleX = 1.1;
	towerGraphics.scaleY = 1.1;
	// Add explosion indicator
	var explosionIndicator = self.attachAsset('upgradeIndicator', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	explosionIndicator.x = 0;
	explosionIndicator.y = 0;
	explosionIndicator.tint = 0xff0000; // Red explosion symbol
	explosionIndicator.scaleX = 1.3;
	explosionIndicator.scaleY = 1.3;
	self.towerType = 'area';
	self.health = 140;
	self.maxHealth = 140;
	self.range = 180;
	self.damage = 25; // Base damage per unit
	self.areaRadius = 80; // Area effect radius
	self.shootCooldown = 0;
	self.target = null;
	self.cost = 130;
	self.canUpgrade = function () {
		return false; // Area towers cannot be upgraded
	};
	self.getUpgradeCost = function () {
		return 0; // Area towers cannot be upgraded
	};
	self.update = function () {
		// Find target (center of enemy group)
		if (!self.target || !self.target.parent) {
			self.target = null;
			var bestTarget = null;
			var maxUnitsInArea = 0;
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				var distance = Math.sqrt(Math.pow(unit.x - self.x, 2) + Math.pow(unit.y - self.y, 2));
				if (distance <= self.range) {
					// Count how many units would be hit if we target this unit
					var unitsInArea = 0;
					for (var j = 0; j < playerUnits.length; j++) {
						var otherUnit = playerUnits[j];
						var areaDistance = Math.sqrt(Math.pow(otherUnit.x - unit.x, 2) + Math.pow(otherUnit.y - unit.y, 2));
						if (areaDistance <= self.areaRadius) {
							unitsInArea++;
						}
					}
					if (unitsInArea > maxUnitsInArea) {
						maxUnitsInArea = unitsInArea;
						bestTarget = unit;
					}
				}
			}
			self.target = bestTarget;
		}
		// Shoot area effect
		if (self.target && self.shootCooldown <= 0) {
			// Create area explosion at target location
			var targetX = self.target.x;
			var targetY = self.target.y;
			// Damage all units in area
			var unitsHit = 0;
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				var distance = Math.sqrt(Math.pow(unit.x - targetX, 2) + Math.pow(unit.y - targetY, 2));
				if (distance <= self.areaRadius) {
					unit.takeDamage(self.damage);
					LK.effects.flashObject(unit, 0xff6600, 300);
					unitsHit++;
				}
			}
			if (unitsHit > 0) {
				// Visual explosion effect
				tween(explosionIndicator, {
					scaleX: 3.0,
					scaleY: 3.0,
					alpha: 0.3
				}, {
					duration: 300,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(explosionIndicator, {
							scaleX: 1.3,
							scaleY: 1.3,
							alpha: 1
						}, {
							duration: 200,
							easing: tween.easeIn
						});
					}
				});
				LK.getSound('shoot').play();
			}
			self.shootCooldown = 150; // 2.5 second cooldown
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			return true; // Tower is destroyed
		}
		return false;
	};
	return self;
});
var AttackUnit = Container.expand(function () {
	var self = Container.call(this);
	var unitGraphics = self.attachAsset('attackUnit', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Health bar background
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBarBg.x = 0;
	healthBarBg.y = -40;
	// Health bar foreground
	var healthBar = self.attachAsset('healthBar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBar.x = 0;
	healthBar.y = -40;
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBar.scaleX = healthPercent;
		// Change color based on health
		if (healthPercent > 0.6) {
			healthBar.tint = 0x00ff00; // Green
		} else if (healthPercent > 0.3) {
			healthBar.tint = 0xffff00; // Yellow
		} else {
			healthBar.tint = 0xff0000; // Red
		}
	};
	self.health = 100;
	self.maxHealth = 100;
	self.speed = 2;
	self.damage = 25;
	self.range = 150;
	self.shootCooldown = 0;
	self.target = null;
	self.lastX = 0;
	self.lastY = 0;
	self.currentWaypoint = 0;
	self.isMovingToWaypoint = false;
	// Create path through tower grid
	var pathWaypoints = [];
	pathWaypoints.push({
		x: 400,
		y: self.y
	});
	// Tower grid parameters
	var gridStartX = 800;
	var gridStartY = 600;
	var gridSpacingX = 200;
	var gridSpacingY = 200;
	var gridRows = 8;
	var gridCols = 4;
	// Serpentine path through towers
	for (var col = 0; col < gridCols; col++) {
		if (col % 2 === 0) {
			for (var row = 0; row < gridRows; row++) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		} else {
			for (var row = gridRows - 1; row >= 0; row--) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		}
	}
	pathWaypoints.push({
		x: 1600,
		y: 1000
	});
	self.pathWaypoints = pathWaypoints;
	self.followPath = function () {
		if (self.isMovingToWaypoint) return;
		if (self.currentWaypoint >= self.pathWaypoints.length) {
			// Reached end of path, move directly to base
			self.x += self.speed;
			return;
		}
		var waypoint = self.pathWaypoints[self.currentWaypoint];
		var distance = Math.sqrt(Math.pow(waypoint.x - self.x, 2) + Math.pow(waypoint.y - self.y, 2));
		var duration = distance / self.speed * 16.67; // Convert speed to ms (60fps = 16.67ms per frame)
		self.isMovingToWaypoint = true;
		tween(self, {
			x: waypoint.x,
			y: waypoint.y
		}, {
			duration: duration,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.currentWaypoint++;
				self.isMovingToWaypoint = false;
			}
		});
	};
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		// Find target (prioritize base, then towers)
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestTarget = null;
			var closestDistance = Infinity;
			// Check distance to enemy base first
			if (enemyBase && enemyBase.parent) {
				var baseDistance = Math.sqrt(Math.pow(enemyBase.x - self.x, 2) + Math.pow(enemyBase.y - self.y, 2));
				if (baseDistance <= self.range) {
					closestTarget = enemyBase;
					closestDistance = baseDistance;
				}
			}
			// Check towers if no base target or if tower is closer
			for (var i = 0; i < enemyTowers.length; i++) {
				var tower = enemyTowers[i];
				if (tower && tower.parent) {
					var towerDistance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
					if (towerDistance <= self.range && towerDistance < closestDistance) {
						closestDistance = towerDistance;
						closestTarget = tower;
					}
				}
			}
			self.target = closestTarget;
		}
		// Attack target if in range
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new UnitBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			unitBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 60; // 1 second cooldown at 60fps
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		// Move towards enemy base using waypoints only if no target in range
		if (!self.target) {
			self.followPath();
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		self.updateHealthBar();
		if (self.health <= 0) {
			return true; // Unit is dead
		}
		return false;
	};
	return self;
});
var BasicTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('enemyTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	towerGraphics.tint = 0x666666; // Gray color for basic tower
	self.towerType = 'basic';
	self.health = 100;
	self.maxHealth = 100;
	self.range = 150;
	self.damage = 20;
	self.shootCooldown = 0;
	self.target = null;
	self.cost = 75;
	self.canUpgrade = function () {
		return false; // Basic towers cannot be upgraded
	};
	self.getUpgradeCost = function () {
		return 0; // Basic towers cannot be upgraded
	};
	self.update = function () {
		// Find target
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestUnit = null;
			var closestDistance = Infinity;
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				var distance = Math.sqrt(Math.pow(unit.x - self.x, 2) + Math.pow(unit.y - self.y, 2));
				if (distance <= self.range && distance < closestDistance) {
					closestDistance = distance;
					closestUnit = unit;
				}
			}
			self.target = closestUnit;
		}
		// Shoot at target
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new TowerBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			towerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 90; // 1.5 second cooldown
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			return true; // Tower is destroyed
		}
		return false;
	};
	return self;
});
var BasicUnit = Container.expand(function () {
	var self = Container.call(this);
	var unitGraphics = self.attachAsset('attackUnit', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	unitGraphics.tint = 0x87CEEB; // Sky blue color for basic unit
	unitGraphics.scaleX = 0.9;
	unitGraphics.scaleY = 0.9;
	// Health bar background
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBarBg.x = 0;
	healthBarBg.y = -35;
	healthBarBg.scaleX = 0.8;
	// Health bar foreground
	var healthBar = self.attachAsset('healthBar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBar.x = 0;
	healthBar.y = -35;
	healthBar.scaleX = 0.8;
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBar.scaleX = healthPercent * 0.8;
		if (healthPercent > 0.6) {
			healthBar.tint = 0x00ff00;
		} else if (healthPercent > 0.3) {
			healthBar.tint = 0xffff00;
		} else {
			healthBar.tint = 0xff0000;
		}
	};
	self.unitType = 'basic';
	self.health = 80;
	self.maxHealth = 80;
	self.speed = 2;
	self.damage = 20;
	self.range = 140;
	self.cost = 40;
	self.shootCooldown = 0;
	self.target = null;
	self.lastX = 0;
	self.lastY = 0;
	self.currentWaypoint = 0;
	self.isMovingToWaypoint = false;
	// Create path through tower grid
	var pathWaypoints = [];
	pathWaypoints.push({
		x: 400,
		y: self.y
	});
	// Tower grid parameters
	var gridStartX = 800;
	var gridStartY = 600;
	var gridSpacingX = 200;
	var gridSpacingY = 200;
	var gridRows = 8;
	var gridCols = 4;
	// Serpentine path through towers
	for (var col = 0; col < gridCols; col++) {
		if (col % 2 === 0) {
			for (var row = 0; row < gridRows; row++) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		} else {
			for (var row = gridRows - 1; row >= 0; row--) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		}
	}
	pathWaypoints.push({
		x: 1600,
		y: 1000
	});
	self.pathWaypoints = pathWaypoints;
	self.followPath = function () {
		if (self.isMovingToWaypoint) return;
		if (self.currentWaypoint >= self.pathWaypoints.length) {
			self.x += self.speed;
			return;
		}
		var waypoint = self.pathWaypoints[self.currentWaypoint];
		var distance = Math.sqrt(Math.pow(waypoint.x - self.x, 2) + Math.pow(waypoint.y - self.y, 2));
		var duration = distance / self.speed * 16.67;
		self.isMovingToWaypoint = true;
		tween(self, {
			x: waypoint.x,
			y: waypoint.y
		}, {
			duration: duration,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.currentWaypoint++;
				self.isMovingToWaypoint = false;
			}
		});
	};
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestTarget = null;
			var closestDistance = Infinity;
			if (enemyBase && enemyBase.parent) {
				var baseDistance = Math.sqrt(Math.pow(enemyBase.x - self.x, 2) + Math.pow(enemyBase.y - self.y, 2));
				if (baseDistance <= self.range) {
					closestTarget = enemyBase;
					closestDistance = baseDistance;
				}
			}
			for (var i = 0; i < enemyTowers.length; i++) {
				var tower = enemyTowers[i];
				if (tower && tower.parent) {
					var towerDistance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
					if (towerDistance <= self.range && towerDistance < closestDistance) {
						closestDistance = towerDistance;
						closestTarget = tower;
					}
				}
			}
			self.target = closestTarget;
		}
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new UnitBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			unitBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 75;
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		if (!self.target) {
			self.followPath();
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		self.updateHealthBar();
		if (self.health <= 0) {
			return true;
		}
		return false;
	};
	return self;
});
var EnemyBase = Container.expand(function () {
	var self = Container.call(this);
	var baseGraphics = self.attachAsset('enemyBase', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.health = 500;
	self.maxHealth = 500;
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xff0000, 300);
		if (self.health <= 0) {
			return true; // Base destroyed - player wins!
		}
		return false;
	};
	return self;
});
// Game arrays to track entities
var EnemyTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('enemyTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Upgrade indicator (initially hidden)
	var upgradeIndicator = self.attachAsset('upgradeIndicator', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	upgradeIndicator.x = 30;
	upgradeIndicator.y = -30;
	upgradeIndicator.visible = false;
	self.level = 1;
	self.maxLevel = 3;
	self.health = 150;
	self.maxHealth = 150;
	self.baseRange = 200;
	self.baseDamage = 30;
	self.range = self.baseRange;
	self.damage = self.baseDamage;
	self.shootCooldown = 0;
	self.target = null;
	self.updateStats = function () {
		var multiplier = 1 + (self.level - 1) * 0.5; // 50% increase per level
		self.range = Math.floor(self.baseRange * multiplier);
		self.damage = Math.floor(self.baseDamage * multiplier);
		self.maxHealth = Math.floor(150 * multiplier);
		self.health = Math.min(self.health, self.maxHealth);
		// Update visual appearance based on level
		if (self.level === 2) {
			towerGraphics.tint = 0xc0392b; // Darker red
			upgradeIndicator.visible = true;
			upgradeIndicator.tint = 0xffd700; // Gold
		} else if (self.level === 3) {
			towerGraphics.tint = 0x8b0000; // Dark red
			upgradeIndicator.visible = true;
			upgradeIndicator.tint = 0xff4500; // Orange red
		}
	};
	self.canUpgrade = function () {
		return self.level < self.maxLevel;
	};
	self.getUpgradeCost = function () {
		return 75 * self.level; // Cost increases with level
	};
	self.upgrade = function () {
		if (self.canUpgrade()) {
			self.level++;
			self.updateStats();
			LK.effects.flashObject(self, 0xffd700, 500);
			return true;
		}
		return false;
	};
	self.update = function () {
		// Increase range and damage if base is low on health
		var baseHealthPercent = enemyBase ? enemyBase.health / enemyBase.maxHealth : 1;
		var bonusRange = baseHealthPercent < 0.5 ? 100 : 0;
		var bonusDamage = baseHealthPercent < 0.3 ? 20 : 0;
		var currentRange = self.range + bonusRange;
		var currentDamage = self.damage + bonusDamage;
		// Find target
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestUnit = null;
			var closestDistance = Infinity;
			// Prioritize units closer to base
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				var distance = Math.sqrt(Math.pow(unit.x - self.x, 2) + Math.pow(unit.y - self.y, 2));
				var distanceToBase = Math.sqrt(Math.pow(unit.x - enemyBase.x, 2) + Math.pow(unit.y - enemyBase.y, 2));
				if (distance <= currentRange) {
					// Prioritize units closer to base
					var priority = distance - distanceToBase * 0.3;
					if (priority < closestDistance) {
						closestDistance = priority;
						closestUnit = unit;
					}
				}
			}
			self.target = closestUnit;
		}
		// Shoot at target
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new TowerBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = currentDamage;
			towerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			// Shoot faster when base is in danger
			var shootCooldown = baseHealthPercent < 0.5 ? 60 : 90;
			self.shootCooldown = shootCooldown;
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			return true; // Tower is destroyed
		}
		return false;
	};
	return self;
});
var FastTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('enemyTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	towerGraphics.tint = 0x00ff00; // Green color for fast tower
	towerGraphics.scaleX = 0.8;
	towerGraphics.scaleY = 0.8;
	self.towerType = 'fast';
	self.health = 80;
	self.maxHealth = 80;
	self.range = 180;
	self.damage = 15;
	self.shootCooldown = 0;
	self.target = null;
	self.cost = 100;
	self.canUpgrade = function () {
		return false; // Fast towers cannot be upgraded
	};
	self.getUpgradeCost = function () {
		return 0; // Fast towers cannot be upgraded
	};
	self.update = function () {
		// Find target
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestUnit = null;
			var closestDistance = Infinity;
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				var distance = Math.sqrt(Math.pow(unit.x - self.x, 2) + Math.pow(unit.y - self.y, 2));
				if (distance <= self.range && distance < closestDistance) {
					closestDistance = distance;
					closestUnit = unit;
				}
			}
			self.target = closestUnit;
		}
		// Shoot at target with fast rate
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new TowerBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			towerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 30; // 0.5 second cooldown (very fast)
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			return true; // Tower is destroyed
		}
		return false;
	};
	return self;
});
var FastUnit = Container.expand(function () {
	var self = Container.call(this);
	var unitGraphics = self.attachAsset('attackUnit', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	unitGraphics.tint = 0x32CD32; // Lime green color for fast unit
	unitGraphics.scaleX = 0.8;
	unitGraphics.scaleY = 0.8;
	// Health bar background
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBarBg.x = 0;
	healthBarBg.y = -32;
	healthBarBg.scaleX = 0.7;
	// Health bar foreground
	var healthBar = self.attachAsset('healthBar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBar.x = 0;
	healthBar.y = -32;
	healthBar.scaleX = 0.7;
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBar.scaleX = healthPercent * 0.7;
		if (healthPercent > 0.6) {
			healthBar.tint = 0x00ff00;
		} else if (healthPercent > 0.3) {
			healthBar.tint = 0xffff00;
		} else {
			healthBar.tint = 0xff0000;
		}
	};
	self.unitType = 'fast';
	self.health = 60;
	self.maxHealth = 60;
	self.speed = 4;
	self.damage = 15;
	self.range = 120;
	self.cost = 60;
	self.shootCooldown = 0;
	self.target = null;
	self.lastX = 0;
	self.lastY = 0;
	self.currentWaypoint = 0;
	self.isMovingToWaypoint = false;
	// Create path through tower grid
	var pathWaypoints = [];
	pathWaypoints.push({
		x: 400,
		y: self.y
	});
	// Tower grid parameters
	var gridStartX = 800;
	var gridStartY = 600;
	var gridSpacingX = 200;
	var gridSpacingY = 200;
	var gridRows = 8;
	var gridCols = 4;
	// Serpentine path through towers
	for (var col = 0; col < gridCols; col++) {
		if (col % 2 === 0) {
			for (var row = 0; row < gridRows; row++) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		} else {
			for (var row = gridRows - 1; row >= 0; row--) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		}
	}
	pathWaypoints.push({
		x: 1600,
		y: 1000
	});
	self.pathWaypoints = pathWaypoints;
	self.followPath = function () {
		if (self.isMovingToWaypoint) return;
		if (self.currentWaypoint >= self.pathWaypoints.length) {
			self.x += self.speed;
			return;
		}
		var waypoint = self.pathWaypoints[self.currentWaypoint];
		var distance = Math.sqrt(Math.pow(waypoint.x - self.x, 2) + Math.pow(waypoint.y - self.y, 2));
		var duration = distance / self.speed * 16.67;
		self.isMovingToWaypoint = true;
		tween(self, {
			x: waypoint.x,
			y: waypoint.y
		}, {
			duration: duration,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.currentWaypoint++;
				self.isMovingToWaypoint = false;
			}
		});
	};
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestTarget = null;
			var closestDistance = Infinity;
			if (enemyBase && enemyBase.parent) {
				var baseDistance = Math.sqrt(Math.pow(enemyBase.x - self.x, 2) + Math.pow(enemyBase.y - self.y, 2));
				if (baseDistance <= self.range) {
					closestTarget = enemyBase;
					closestDistance = baseDistance;
				}
			}
			for (var i = 0; i < enemyTowers.length; i++) {
				var tower = enemyTowers[i];
				if (tower && tower.parent) {
					var towerDistance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
					if (towerDistance <= self.range && towerDistance < closestDistance) {
						closestDistance = towerDistance;
						closestTarget = tower;
					}
				}
			}
			self.target = closestTarget;
		}
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new UnitBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			unitBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 45; // Faster shooting
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		if (!self.target) {
			self.followPath();
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		self.updateHealthBar();
		if (self.health <= 0) {
			return true;
		}
		return false;
	};
	return self;
});
var HealTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('enemyTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	towerGraphics.tint = 0x00ff99; // Green-cyan color for heal tower
	towerGraphics.scaleX = 1.0;
	towerGraphics.scaleY = 1.0;
	// Add a cross symbol effect
	var crossIndicator = self.attachAsset('upgradeIndicator', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	crossIndicator.x = 0;
	crossIndicator.y = 0;
	crossIndicator.tint = 0xffffff; // White cross
	crossIndicator.scaleX = 1.5;
	crossIndicator.scaleY = 1.5;
	self.towerType = 'heal';
	self.health = 120;
	self.maxHealth = 120;
	self.range = 200; // Healing range
	self.healAmount = 15;
	self.healCooldown = 0;
	self.target = null;
	self.cost = 110;
	self.canUpgrade = function () {
		return false; // Heal towers cannot be upgraded
	};
	self.getUpgradeCost = function () {
		return 0; // Heal towers cannot be upgraded
	};
	self.update = function () {
		// Find damaged towers to heal
		if (self.healCooldown <= 0) {
			self.target = null;
			var bestTarget = null;
			var lowestHealthPercent = 1;
			for (var i = 0; i < enemyTowers.length; i++) {
				var tower = enemyTowers[i];
				if (tower !== self && tower.parent) {
					var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
					if (distance <= self.range) {
						var healthPercent = tower.health / tower.maxHealth;
						if (healthPercent < 1 && healthPercent < lowestHealthPercent) {
							lowestHealthPercent = healthPercent;
							bestTarget = tower;
						}
					}
				}
			}
			self.target = bestTarget;
		}
		// Heal target
		if (self.target && self.healCooldown <= 0) {
			var healingAmount = Math.min(self.healAmount, self.target.maxHealth - self.target.health);
			if (healingAmount > 0) {
				self.target.health += healingAmount;
				LK.effects.flashObject(self.target, 0x00ff00, 400);
				// Create healing visual effect
				tween(crossIndicator, {
					scaleX: 2.0,
					scaleY: 2.0
				}, {
					duration: 200,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						tween(crossIndicator, {
							scaleX: 1.5,
							scaleY: 1.5
						}, {
							duration: 200,
							easing: tween.easeIn
						});
					}
				});
				self.healCooldown = 120; // 2 second cooldown
			}
		}
		if (self.healCooldown > 0) {
			self.healCooldown--;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			return true; // Tower is destroyed
		}
		return false;
	};
	return self;
});
var HeavyTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('enemyTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	towerGraphics.tint = 0x8b4513; // Brown color for heavy tower
	towerGraphics.scaleX = 1.3;
	towerGraphics.scaleY = 1.3;
	self.towerType = 'heavy';
	self.health = 200;
	self.maxHealth = 200;
	self.range = 160;
	self.damage = 50;
	self.shootCooldown = 0;
	self.target = null;
	self.cost = 150;
	self.canUpgrade = function () {
		return false; // Heavy towers cannot be upgraded
	};
	self.getUpgradeCost = function () {
		return 0; // Heavy towers cannot be upgraded
	};
	self.update = function () {
		// Find target
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestUnit = null;
			var closestDistance = Infinity;
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				var distance = Math.sqrt(Math.pow(unit.x - self.x, 2) + Math.pow(unit.y - self.y, 2));
				if (distance <= self.range && distance < closestDistance) {
					closestDistance = distance;
					closestUnit = unit;
				}
			}
			self.target = closestUnit;
		}
		// Shoot at target with heavy damage
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new TowerBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			towerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 120; // 2 second cooldown (slow)
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			return true; // Tower is destroyed
		}
		return false;
	};
	return self;
});
var HeavyUnit = Container.expand(function () {
	var self = Container.call(this);
	var unitGraphics = self.attachAsset('attackUnit', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	unitGraphics.tint = 0x8B4513; // Brown color for heavy unit
	unitGraphics.scaleX = 1.2;
	unitGraphics.scaleY = 1.2;
	// Health bar background
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBarBg.x = 0;
	healthBarBg.y = -45;
	healthBarBg.scaleX = 1.0;
	// Health bar foreground
	var healthBar = self.attachAsset('healthBar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBar.x = 0;
	healthBar.y = -45;
	healthBar.scaleX = 1.0;
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBar.scaleX = healthPercent * 1.0;
		if (healthPercent > 0.6) {
			healthBar.tint = 0x00ff00;
		} else if (healthPercent > 0.3) {
			healthBar.tint = 0xffff00;
		} else {
			healthBar.tint = 0xff0000;
		}
	};
	self.unitType = 'heavy';
	self.health = 150;
	self.maxHealth = 150;
	self.speed = 1;
	self.damage = 40;
	self.range = 160;
	self.cost = 90;
	self.shootCooldown = 0;
	self.target = null;
	self.lastX = 0;
	self.lastY = 0;
	self.currentWaypoint = 0;
	self.isMovingToWaypoint = false;
	// Create path through tower grid
	var pathWaypoints = [];
	pathWaypoints.push({
		x: 400,
		y: self.y
	});
	// Tower grid parameters
	var gridStartX = 800;
	var gridStartY = 600;
	var gridSpacingX = 200;
	var gridSpacingY = 200;
	var gridRows = 8;
	var gridCols = 4;
	// Serpentine path through towers
	for (var col = 0; col < gridCols; col++) {
		if (col % 2 === 0) {
			for (var row = 0; row < gridRows; row++) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		} else {
			for (var row = gridRows - 1; row >= 0; row--) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		}
	}
	pathWaypoints.push({
		x: 1600,
		y: 1000
	});
	self.pathWaypoints = pathWaypoints;
	self.followPath = function () {
		if (self.isMovingToWaypoint) return;
		if (self.currentWaypoint >= self.pathWaypoints.length) {
			self.x += self.speed;
			return;
		}
		var waypoint = self.pathWaypoints[self.currentWaypoint];
		var distance = Math.sqrt(Math.pow(waypoint.x - self.x, 2) + Math.pow(waypoint.y - self.y, 2));
		var duration = distance / self.speed * 16.67;
		self.isMovingToWaypoint = true;
		tween(self, {
			x: waypoint.x,
			y: waypoint.y
		}, {
			duration: duration,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.currentWaypoint++;
				self.isMovingToWaypoint = false;
			}
		});
	};
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestTarget = null;
			var closestDistance = Infinity;
			if (enemyBase && enemyBase.parent) {
				var baseDistance = Math.sqrt(Math.pow(enemyBase.x - self.x, 2) + Math.pow(enemyBase.y - self.y, 2));
				if (baseDistance <= self.range) {
					closestTarget = enemyBase;
					closestDistance = baseDistance;
				}
			}
			for (var i = 0; i < enemyTowers.length; i++) {
				var tower = enemyTowers[i];
				if (tower && tower.parent) {
					var towerDistance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
					if (towerDistance <= self.range && towerDistance < closestDistance) {
						closestDistance = towerDistance;
						closestTarget = tower;
					}
				}
			}
			self.target = closestTarget;
		}
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new UnitBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			unitBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 100; // Slower shooting
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		if (!self.target) {
			self.followPath();
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		self.updateHealthBar();
		if (self.health <= 0) {
			return true;
		}
		return false;
	};
	return self;
});
var SniperTower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('enemyTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	towerGraphics.tint = 0x4169e1; // Royal blue color for sniper tower
	towerGraphics.scaleY = 1.2; // Make it taller
	self.towerType = 'sniper';
	self.health = 120;
	self.maxHealth = 120;
	self.range = 300; // Very long range
	self.damage = 40;
	self.shootCooldown = 0;
	self.target = null;
	self.cost = 125;
	self.canUpgrade = function () {
		return false; // Sniper towers cannot be upgraded
	};
	self.getUpgradeCost = function () {
		return 0; // Sniper towers cannot be upgraded
	};
	self.update = function () {
		// Find target (prioritize units furthest away)
		if (!self.target || !self.target.parent) {
			self.target = null;
			var bestUnit = null;
			var longestDistance = 0;
			for (var i = 0; i < playerUnits.length; i++) {
				var unit = playerUnits[i];
				var distance = Math.sqrt(Math.pow(unit.x - self.x, 2) + Math.pow(unit.y - self.y, 2));
				if (distance <= self.range && distance > longestDistance) {
					longestDistance = distance;
					bestUnit = unit;
				}
			}
			self.target = bestUnit;
		}
		// Shoot at target with precision
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new TowerBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			bullet.speed = 10; // Faster bullet
			towerBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 150; // 2.5 second cooldown
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		LK.effects.flashObject(self, 0xff0000, 200);
		if (self.health <= 0) {
			return true; // Tower is destroyed
		}
		return false;
	};
	return self;
});
var SniperUnit = Container.expand(function () {
	var self = Container.call(this);
	var unitGraphics = self.attachAsset('attackUnit', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	unitGraphics.tint = 0x4B0082; // Indigo color for sniper unit
	unitGraphics.scaleX = 1.0;
	unitGraphics.scaleY = 1.3; // Taller appearance
	// Health bar background
	var healthBarBg = self.attachAsset('healthBarBg', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBarBg.x = 0;
	healthBarBg.y = -42;
	healthBarBg.scaleX = 0.9;
	// Health bar foreground
	var healthBar = self.attachAsset('healthBar', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	healthBar.x = 0;
	healthBar.y = -42;
	healthBar.scaleX = 0.9;
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBar.scaleX = healthPercent * 0.9;
		if (healthPercent > 0.6) {
			healthBar.tint = 0x00ff00;
		} else if (healthPercent > 0.3) {
			healthBar.tint = 0xffff00;
		} else {
			healthBar.tint = 0xff0000;
		}
	};
	self.unitType = 'sniper';
	self.health = 70;
	self.maxHealth = 70;
	self.speed = 1.5;
	self.damage = 50;
	self.range = 250; // Very long range
	self.cost = 80;
	self.shootCooldown = 0;
	self.target = null;
	self.lastX = 0;
	self.lastY = 0;
	self.currentWaypoint = 0;
	self.isMovingToWaypoint = false;
	// Create path through tower grid
	var pathWaypoints = [];
	pathWaypoints.push({
		x: 400,
		y: self.y
	});
	// Tower grid parameters
	var gridStartX = 800;
	var gridStartY = 600;
	var gridSpacingX = 200;
	var gridSpacingY = 200;
	var gridRows = 8;
	var gridCols = 4;
	// Serpentine path through towers
	for (var col = 0; col < gridCols; col++) {
		if (col % 2 === 0) {
			for (var row = 0; row < gridRows; row++) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		} else {
			for (var row = gridRows - 1; row >= 0; row--) {
				pathWaypoints.push({
					x: gridStartX + col * gridSpacingX,
					y: gridStartY + row * gridSpacingY
				});
			}
		}
	}
	pathWaypoints.push({
		x: 1600,
		y: 1000
	});
	self.pathWaypoints = pathWaypoints;
	self.followPath = function () {
		if (self.isMovingToWaypoint) return;
		if (self.currentWaypoint >= self.pathWaypoints.length) {
			self.x += self.speed;
			return;
		}
		var waypoint = self.pathWaypoints[self.currentWaypoint];
		var distance = Math.sqrt(Math.pow(waypoint.x - self.x, 2) + Math.pow(waypoint.y - self.y, 2));
		var duration = distance / self.speed * 16.67;
		self.isMovingToWaypoint = true;
		tween(self, {
			x: waypoint.x,
			y: waypoint.y
		}, {
			duration: duration,
			easing: tween.linear,
			onFinish: function onFinish() {
				self.currentWaypoint++;
				self.isMovingToWaypoint = false;
			}
		});
	};
	self.update = function () {
		self.lastX = self.x;
		self.lastY = self.y;
		if (!self.target || !self.target.parent) {
			self.target = null;
			var closestTarget = null;
			var closestDistance = Infinity;
			// Prioritize towers over base due to long range
			for (var i = 0; i < enemyTowers.length; i++) {
				var tower = enemyTowers[i];
				if (tower && tower.parent) {
					var towerDistance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
					if (towerDistance <= self.range && towerDistance < closestDistance) {
						closestDistance = towerDistance;
						closestTarget = tower;
					}
				}
			}
			// Check base if no towers in range
			if (!closestTarget && enemyBase && enemyBase.parent) {
				var baseDistance = Math.sqrt(Math.pow(enemyBase.x - self.x, 2) + Math.pow(enemyBase.y - self.y, 2));
				if (baseDistance <= self.range) {
					closestTarget = enemyBase;
					closestDistance = baseDistance;
				}
			}
			self.target = closestTarget;
		}
		if (self.target && self.shootCooldown <= 0) {
			var bullet = new UnitBullet();
			bullet.x = self.x;
			bullet.y = self.y;
			bullet.target = self.target;
			bullet.damage = self.damage;
			bullet.speed = 12; // Faster bullet
			unitBullets.push(bullet);
			game.addChild(bullet);
			LK.getSound('shoot').play();
			self.shootCooldown = 120; // Slow shooting rate
		}
		if (self.shootCooldown > 0) {
			self.shootCooldown--;
		}
		if (!self.target) {
			self.followPath();
		}
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		self.updateHealthBar();
		if (self.health <= 0) {
			return true;
		}
		return false;
	};
	return self;
});
var TowerBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('towerBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 6;
	self.target = null;
	self.damage = 30;
	self.update = function () {
		if (!self.target || !self.target.parent) {
			// Target destroyed, remove bullet
			return;
		}
		// 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 < 10) {
			// Hit target
			if (self.target.takeDamage) {
				self.target.takeDamage(self.damage);
				LK.getSound('hit').play();
			}
			return; // Bullet will be removed
		}
		// Normalize and move
		self.x += dx / distance * self.speed;
		self.y += dy / distance * self.speed;
	};
	return self;
});
var TowerSlot = Container.expand(function () {
	var self = Container.call(this);
	var slotGraphics = self.attachAsset('towerSlot', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	slotGraphics.alpha = 0.3;
	self.occupied = false;
	self.tower = null;
	self.placeTower = function () {
		if (!self.occupied) {
			var tower = new EnemyTower();
			tower.x = self.x;
			tower.y = self.y;
			tower.slot = self;
			tower.updateStats(); // Initialize stats properly
			enemyTowers.push(tower);
			game.addChild(tower);
			self.occupied = true;
			self.tower = tower;
			slotGraphics.alpha = 0.1;
			return tower;
		}
		return null;
	};
	self.removeTower = function () {
		if (self.occupied && self.tower) {
			self.occupied = false;
			self.tower = null;
			slotGraphics.alpha = 0.3;
		}
	};
	return self;
});
var UnitBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('unitBullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.target = null;
	self.damage = 25;
	self.update = function () {
		if (!self.target || !self.target.parent) {
			// Target destroyed, remove bullet
			return;
		}
		// 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 < 10) {
			// Hit target
			if (self.target.takeDamage) {
				self.target.takeDamage(self.damage);
				LK.getSound('hit').play();
			}
			return; // Bullet will be removed
		}
		// Normalize and move
		self.x += dx / distance * self.speed;
		self.y += dy / distance * self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2d5016
});

/**** 
* Game Code
****/ 
// Game arrays to track entities
// Initialize game assets
var playerUnits = [];
var enemyTowers = [];
var unitBullets = [];
var towerBullets = [];
var towerSlots = [];
var enemyBase;
// Game resources
var coins = 150;
var unitCost = 50;
// UI Elements
var coinsText = new Text2('Coins: ' + coins, {
	size: 80,
	fill: 0xFFD700
});
coinsText.anchor.set(1, 0);
coinsText.x = -20; // Small margin from right edge
coinsText.y = 20; // Small margin from top
LK.gui.topRight.addChild(coinsText);
var coinIcon = LK.getAsset('coinIcon', {
	anchorX: 0.5,
	anchorY: 0.5
});
coinIcon.x = -coinsText.width - 60; // Position to left of text
coinIcon.y = 45; // Align with text
LK.gui.topRight.addChild(coinIcon);
var healthText = new Text2('Base Health: 500', {
	size: 50,
	fill: 0xFFFFFF
});
healthText.anchor.set(0.5, 0);
LK.gui.top.addChild(healthText);
// Unit spawn buttons
var basicButton = new Text2('Basic (40)', {
	size: 40,
	fill: 0x87CEEB
});
basicButton.anchor.set(0.5, 1);
basicButton.x = -300;
basicButton.interactive = true;
basicButton.down = function () {
	if (coins >= 40) {
		spawnUnit('basic');
	}
};
LK.gui.bottom.addChild(basicButton);
var fastButton = new Text2('Fast (60)', {
	size: 40,
	fill: 0x32CD32
});
fastButton.anchor.set(0.5, 1);
fastButton.x = -100;
fastButton.interactive = true;
fastButton.down = function () {
	if (coins >= 60) {
		spawnUnit('fast');
	}
};
LK.gui.bottom.addChild(fastButton);
var heavyButton = new Text2('Heavy (90)', {
	size: 40,
	fill: 0x8B4513
});
heavyButton.anchor.set(0.5, 1);
heavyButton.x = 100;
heavyButton.interactive = true;
heavyButton.down = function () {
	if (coins >= 90) {
		spawnUnit('heavy');
	}
};
LK.gui.bottom.addChild(heavyButton);
var sniperButton = new Text2('Sniper (80)', {
	size: 40,
	fill: 0x4B0082
});
sniperButton.anchor.set(0.5, 1);
sniperButton.x = 300;
sniperButton.interactive = true;
sniperButton.down = function () {
	if (coins >= 80) {
		spawnUnit('sniper');
	}
};
LK.gui.bottom.addChild(sniperButton);
// Create enemy base
enemyBase = game.addChild(new EnemyBase());
enemyBase.x = 1800;
enemyBase.y = 2732 / 2;
// Create tower slots in a grid
var gridStartX = 800;
var gridStartY = 600;
var gridSpacingX = 200;
var gridSpacingY = 200;
var gridRows = 8;
var gridCols = 4;
for (var row = 0; row < gridRows; row++) {
	for (var col = 0; col < gridCols; col++) {
		var slot = new TowerSlot();
		slot.x = gridStartX + col * gridSpacingX;
		slot.y = gridStartY + row * gridSpacingY;
		towerSlots.push(slot);
		game.addChild(slot);
	}
}
// Initially place some towers in random slots
var initialTowerCount = 4;
var placedTowers = 0;
while (placedTowers < initialTowerCount && placedTowers < towerSlots.length) {
	var randomSlotIndex = Math.floor(Math.random() * towerSlots.length);
	var slot = towerSlots[randomSlotIndex];
	if (slot.placeTower()) {
		placedTowers++;
	}
}
function spawnUnit(unitType) {
	if (!unitType) unitType = 'basic';
	var unit = null;
	var cost = 40;
	switch (unitType) {
		case 'basic':
			unit = new BasicUnit();
			cost = 40;
			break;
		case 'fast':
			unit = new FastUnit();
			cost = 60;
			break;
		case 'heavy':
			unit = new HeavyUnit();
			cost = 90;
			break;
		case 'sniper':
			unit = new SniperUnit();
			cost = 80;
			break;
		default:
			unit = new BasicUnit();
			cost = 40;
			break;
	}
	if (coins >= cost && unit) {
		coins -= cost;
		coinsText.setText('Coins: ' + coins);
		coinIcon.x = -coinsText.width - 60;
		unit.x = 100;
		unit.y = 500 + playerUnits.length % 5 * 150;
		// Create path that goes through all tower positions
		var pathWaypoints = [];
		// Start from spawn position
		pathWaypoints.push({
			x: 400,
			y: unit.y
		});
		// Add waypoints to pass through tower grid
		var gridStartX = 800;
		var gridStartY = 600;
		var gridSpacingX = 200;
		var gridSpacingY = 200;
		var gridRows = 8;
		var gridCols = 4;
		// Create serpentine path through tower grid
		for (var col = 0; col < gridCols; col++) {
			if (col % 2 === 0) {
				// Go down for even columns
				for (var row = 0; row < gridRows; row++) {
					pathWaypoints.push({
						x: gridStartX + col * gridSpacingX,
						y: gridStartY + row * gridSpacingY
					});
				}
			} else {
				// Go up for odd columns  
				for (var row = gridRows - 1; row >= 0; row--) {
					pathWaypoints.push({
						x: gridStartX + col * gridSpacingX,
						y: gridStartY + row * gridSpacingY
					});
				}
			}
		}
		// Final waypoint towards the base
		pathWaypoints.push({
			x: 1600,
			y: 1366
		});
		unit.pathWaypoints = pathWaypoints;
		playerUnits.push(unit);
		game.addChild(unit);
		unit.updateHealthBar();
		LK.getSound('unitSpawn').play();
	}
}
// Coin generation timer
var coinTimer = 0;
// Enemy AI system
var enemyAI = {
	coins: 200,
	towerCost: 100,
	lastTowerPlacement: 0,
	placementCooldown: 300,
	// 5 seconds at 60fps
	update: function update() {
		// Generate coins for enemy AI
		if (LK.ticks % 180 === 0) {
			// Every 3 seconds
			this.coins += 50;
		}
		// Check if should place new towers
		if (this.coins >= this.towerCost && LK.ticks - this.lastTowerPlacement > this.placementCooldown) {
			this.considerTowerPlacement();
		}
		// Upgrade existing towers
		this.considerTowerUpgrades();
		// Repair damaged towers
		this.repairTowers();
	},
	considerTowerPlacement: function considerTowerPlacement() {
		// Find empty slots closest to player units
		var bestSlot = null;
		var minDistance = Infinity;
		for (var i = 0; i < towerSlots.length; i++) {
			var slot = towerSlots[i];
			if (!slot.occupied) {
				// Calculate average distance to all player units
				var totalDistance = 0;
				var unitCount = 0;
				for (var j = 0; j < playerUnits.length; j++) {
					var unit = playerUnits[j];
					var distance = Math.sqrt(Math.pow(unit.x - slot.x, 2) + Math.pow(unit.y - slot.y, 2));
					totalDistance += distance;
					unitCount++;
				}
				if (unitCount > 0) {
					var avgDistance = totalDistance / unitCount;
					if (avgDistance < minDistance && avgDistance < 400) {
						// Only place if units are nearby
						minDistance = avgDistance;
						bestSlot = slot;
					}
				}
			}
		}
		// Place tower at best location
		if (bestSlot) {
			// Choose random tower type based on available coins
			var towerTypes = [];
			if (this.coins >= 75) towerTypes.push('basic');
			if (this.coins >= 100) towerTypes.push('fast');
			if (this.coins >= 110) towerTypes.push('heal');
			if (this.coins >= 125) towerTypes.push('sniper');
			if (this.coins >= 130) towerTypes.push('area');
			if (this.coins >= 150) towerTypes.push('heavy');
			if (towerTypes.length > 0) {
				var randomType = towerTypes[Math.floor(Math.random() * towerTypes.length)];
				var tower = null;
				var cost = 75;
				switch (randomType) {
					case 'basic':
						tower = new BasicTower();
						cost = 75;
						break;
					case 'fast':
						tower = new FastTower();
						cost = 100;
						break;
					case 'heal':
						tower = new HealTower();
						cost = 110;
						break;
					case 'sniper':
						tower = new SniperTower();
						cost = 125;
						break;
					case 'area':
						tower = new AreaTower();
						cost = 130;
						break;
					case 'heavy':
						tower = new HeavyTower();
						cost = 150;
						break;
				}
				if (tower) {
					tower.x = bestSlot.x;
					tower.y = bestSlot.y;
					tower.slot = bestSlot;
					enemyTowers.push(tower);
					game.addChild(tower);
					bestSlot.occupied = true;
					bestSlot.tower = tower;
					bestSlot.attachAsset('towerSlot', {}).alpha = 0.1;
					this.coins -= cost;
					this.lastTowerPlacement = LK.ticks;
					// Visual feedback
					LK.effects.flashObject(bestSlot, 0xff0000, 500);
				}
			}
		}
	},
	considerTowerUpgrades: function considerTowerUpgrades() {
		// Find towers that can be upgraded and are in combat zones
		for (var i = 0; i < enemyTowers.length; i++) {
			var tower = enemyTowers[i];
			if (tower.canUpgrade()) {
				var upgradeCost = tower.getUpgradeCost();
				if (this.coins >= upgradeCost) {
					// Check if tower is in an active combat zone (has nearby player units)
					var nearbyUnits = 0;
					for (var j = 0; j < playerUnits.length; j++) {
						var unit = playerUnits[j];
						var distance = Math.sqrt(Math.pow(unit.x - tower.x, 2) + Math.pow(unit.y - tower.y, 2));
						if (distance <= tower.range + 100) {
							nearbyUnits++;
						}
					}
					// Upgrade towers that are actively engaged or if we have excess coins
					if (nearbyUnits > 0 || this.coins > upgradeCost * 2) {
						if (tower.upgrade()) {
							this.coins -= upgradeCost;
							break; // Only upgrade one tower per update
						}
					}
				}
			}
		}
	},
	repairTowers: function repairTowers() {
		// Find damaged towers and repair them
		for (var i = 0; i < enemyTowers.length; i++) {
			var tower = enemyTowers[i];
			if (tower.health < tower.maxHealth * 0.5 && this.coins >= 25) {
				tower.health = Math.min(tower.health + 25, tower.maxHealth);
				this.coins -= 25;
				LK.effects.flashObject(tower, 0x00ff00, 300);
				break; // Only repair one tower per update
			}
		}
	}
};
// Touch controls for spawning units
game.down = function (x, y, obj) {
	if (coins >= 40) {
		spawnUnit('basic');
	}
};
game.update = function () {
	// Update enemy AI
	enemyAI.update();
	// Generate coins over time
	coinTimer++;
	if (coinTimer >= 120) {
		// Every 2 seconds
		coins += 25;
		coinsText.setText('Coins: ' + coins);
		coinIcon.x = -coinsText.width - 60; // Update icon position
		coinTimer = 0;
	}
	// Update unit bullets
	for (var i = unitBullets.length - 1; i >= 0; i--) {
		var bullet = unitBullets[i];
		if (!bullet.target || !bullet.target.parent) {
			bullet.destroy();
			unitBullets.splice(i, 1);
			continue;
		}
		var dx = bullet.target.x - bullet.x;
		var dy = bullet.target.y - bullet.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 15) {
			// Hit target
			var isDead = bullet.target.takeDamage(bullet.damage);
			if (isDead) {
				// Remove from appropriate array
				if (bullet.target === enemyBase) {
					// Player wins!
					LK.effects.flashScreen(0x00ff00, 2000);
					LK.showYouWin();
					return;
				} else {
					// Remove tower
					for (var j = 0; j < enemyTowers.length; j++) {
						if (enemyTowers[j] === bullet.target) {
							// Calculate money reward based on tower type and level
							var moneyReward = 75; // Base reward
							if (enemyTowers[j].towerType) {
								switch (enemyTowers[j].towerType) {
									case 'fast':
										moneyReward = 100;
										break;
									case 'heal':
										moneyReward = 110;
										break;
									case 'sniper':
										moneyReward = 125;
										break;
									case 'area':
										moneyReward = 130;
										break;
									case 'heavy':
										moneyReward = 150;
										break;
									default:
										moneyReward = 75;
										break;
								}
							} else if (enemyTowers[j].level) {
								// For upgradeable towers, reward based on level
								moneyReward = 75 + (enemyTowers[j].level - 1) * 50;
							}
							// Clean up slot if tower has one
							if (enemyTowers[j].slot) {
								enemyTowers[j].slot.removeTower();
							}
							enemyTowers[j].destroy();
							enemyTowers.splice(j, 1);
							coins += moneyReward; // Money reward for destroying tower
							coinsText.setText('Coins: ' + coins);
							coinIcon.x = -coinsText.width - 60; // Update icon position
							break;
						}
					}
				}
			}
			bullet.destroy();
			unitBullets.splice(i, 1);
		}
	}
	// Update tower bullets
	for (var i = towerBullets.length - 1; i >= 0; i--) {
		var bullet = towerBullets[i];
		if (!bullet.target || !bullet.target.parent) {
			bullet.destroy();
			towerBullets.splice(i, 1);
			continue;
		}
		var dx = bullet.target.x - bullet.x;
		var dy = bullet.target.y - bullet.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 15) {
			// Hit target
			var isDead = bullet.target.takeDamage(bullet.damage);
			if (isDead) {
				// Remove unit
				for (var j = 0; j < playerUnits.length; j++) {
					if (playerUnits[j] === bullet.target) {
						playerUnits[j].destroy();
						playerUnits.splice(j, 1);
						break;
					}
				}
			}
			bullet.destroy();
			towerBullets.splice(i, 1);
		}
	}
	// Check if player has no units and insufficient coins (lose condition)
	if (playerUnits.length === 0 && coins < unitCost) {
		// Check if there are still towers or base with health
		if (enemyTowers.length > 0 || enemyBase && enemyBase.health > 0) {
			LK.effects.flashScreen(0xff0000, 2000);
			LK.showGameOver();
			return;
		}
	}
	// Update base health display
	if (enemyBase) {
		healthText.setText('Base Health: ' + enemyBase.health);
	}
};

===================================================================
--- original.js
+++ change.js
@@ -5,8 +5,123 @@
 
 /**** 
 * Classes
 ****/ 
+var AreaTower = Container.expand(function () {
+	var self = Container.call(this);
+	var towerGraphics = self.attachAsset('enemyTower', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	towerGraphics.tint = 0xff6600; // Orange color for area tower
+	towerGraphics.scaleX = 1.1;
+	towerGraphics.scaleY = 1.1;
+	// Add explosion indicator
+	var explosionIndicator = self.attachAsset('upgradeIndicator', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	explosionIndicator.x = 0;
+	explosionIndicator.y = 0;
+	explosionIndicator.tint = 0xff0000; // Red explosion symbol
+	explosionIndicator.scaleX = 1.3;
+	explosionIndicator.scaleY = 1.3;
+	self.towerType = 'area';
+	self.health = 140;
+	self.maxHealth = 140;
+	self.range = 180;
+	self.damage = 25; // Base damage per unit
+	self.areaRadius = 80; // Area effect radius
+	self.shootCooldown = 0;
+	self.target = null;
+	self.cost = 130;
+	self.canUpgrade = function () {
+		return false; // Area towers cannot be upgraded
+	};
+	self.getUpgradeCost = function () {
+		return 0; // Area towers cannot be upgraded
+	};
+	self.update = function () {
+		// Find target (center of enemy group)
+		if (!self.target || !self.target.parent) {
+			self.target = null;
+			var bestTarget = null;
+			var maxUnitsInArea = 0;
+			for (var i = 0; i < playerUnits.length; i++) {
+				var unit = playerUnits[i];
+				var distance = Math.sqrt(Math.pow(unit.x - self.x, 2) + Math.pow(unit.y - self.y, 2));
+				if (distance <= self.range) {
+					// Count how many units would be hit if we target this unit
+					var unitsInArea = 0;
+					for (var j = 0; j < playerUnits.length; j++) {
+						var otherUnit = playerUnits[j];
+						var areaDistance = Math.sqrt(Math.pow(otherUnit.x - unit.x, 2) + Math.pow(otherUnit.y - unit.y, 2));
+						if (areaDistance <= self.areaRadius) {
+							unitsInArea++;
+						}
+					}
+					if (unitsInArea > maxUnitsInArea) {
+						maxUnitsInArea = unitsInArea;
+						bestTarget = unit;
+					}
+				}
+			}
+			self.target = bestTarget;
+		}
+		// Shoot area effect
+		if (self.target && self.shootCooldown <= 0) {
+			// Create area explosion at target location
+			var targetX = self.target.x;
+			var targetY = self.target.y;
+			// Damage all units in area
+			var unitsHit = 0;
+			for (var i = 0; i < playerUnits.length; i++) {
+				var unit = playerUnits[i];
+				var distance = Math.sqrt(Math.pow(unit.x - targetX, 2) + Math.pow(unit.y - targetY, 2));
+				if (distance <= self.areaRadius) {
+					unit.takeDamage(self.damage);
+					LK.effects.flashObject(unit, 0xff6600, 300);
+					unitsHit++;
+				}
+			}
+			if (unitsHit > 0) {
+				// Visual explosion effect
+				tween(explosionIndicator, {
+					scaleX: 3.0,
+					scaleY: 3.0,
+					alpha: 0.3
+				}, {
+					duration: 300,
+					easing: tween.easeOut,
+					onFinish: function onFinish() {
+						tween(explosionIndicator, {
+							scaleX: 1.3,
+							scaleY: 1.3,
+							alpha: 1
+						}, {
+							duration: 200,
+							easing: tween.easeIn
+						});
+					}
+				});
+				LK.getSound('shoot').play();
+			}
+			self.shootCooldown = 150; // 2.5 second cooldown
+		}
+		if (self.shootCooldown > 0) {
+			self.shootCooldown--;
+		}
+	};
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		LK.effects.flashObject(self, 0xff0000, 200);
+		if (self.health <= 0) {
+			return true; // Tower is destroyed
+		}
+		return false;
+	};
+	return self;
+});
 var AttackUnit = Container.expand(function () {
 	var self = Container.call(this);
 	var unitGraphics = self.attachAsset('attackUnit', {
 		anchorX: 0.5,
@@ -747,8 +862,102 @@
 		return false;
 	};
 	return self;
 });
+var HealTower = Container.expand(function () {
+	var self = Container.call(this);
+	var towerGraphics = self.attachAsset('enemyTower', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	towerGraphics.tint = 0x00ff99; // Green-cyan color for heal tower
+	towerGraphics.scaleX = 1.0;
+	towerGraphics.scaleY = 1.0;
+	// Add a cross symbol effect
+	var crossIndicator = self.attachAsset('upgradeIndicator', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	crossIndicator.x = 0;
+	crossIndicator.y = 0;
+	crossIndicator.tint = 0xffffff; // White cross
+	crossIndicator.scaleX = 1.5;
+	crossIndicator.scaleY = 1.5;
+	self.towerType = 'heal';
+	self.health = 120;
+	self.maxHealth = 120;
+	self.range = 200; // Healing range
+	self.healAmount = 15;
+	self.healCooldown = 0;
+	self.target = null;
+	self.cost = 110;
+	self.canUpgrade = function () {
+		return false; // Heal towers cannot be upgraded
+	};
+	self.getUpgradeCost = function () {
+		return 0; // Heal towers cannot be upgraded
+	};
+	self.update = function () {
+		// Find damaged towers to heal
+		if (self.healCooldown <= 0) {
+			self.target = null;
+			var bestTarget = null;
+			var lowestHealthPercent = 1;
+			for (var i = 0; i < enemyTowers.length; i++) {
+				var tower = enemyTowers[i];
+				if (tower !== self && tower.parent) {
+					var distance = Math.sqrt(Math.pow(tower.x - self.x, 2) + Math.pow(tower.y - self.y, 2));
+					if (distance <= self.range) {
+						var healthPercent = tower.health / tower.maxHealth;
+						if (healthPercent < 1 && healthPercent < lowestHealthPercent) {
+							lowestHealthPercent = healthPercent;
+							bestTarget = tower;
+						}
+					}
+				}
+			}
+			self.target = bestTarget;
+		}
+		// Heal target
+		if (self.target && self.healCooldown <= 0) {
+			var healingAmount = Math.min(self.healAmount, self.target.maxHealth - self.target.health);
+			if (healingAmount > 0) {
+				self.target.health += healingAmount;
+				LK.effects.flashObject(self.target, 0x00ff00, 400);
+				// Create healing visual effect
+				tween(crossIndicator, {
+					scaleX: 2.0,
+					scaleY: 2.0
+				}, {
+					duration: 200,
+					easing: tween.easeOut,
+					onFinish: function onFinish() {
+						tween(crossIndicator, {
+							scaleX: 1.5,
+							scaleY: 1.5
+						}, {
+							duration: 200,
+							easing: tween.easeIn
+						});
+					}
+				});
+				self.healCooldown = 120; // 2 second cooldown
+			}
+		}
+		if (self.healCooldown > 0) {
+			self.healCooldown--;
+		}
+	};
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		LK.effects.flashObject(self, 0xff0000, 200);
+		if (self.health <= 0) {
+			return true; // Tower is destroyed
+		}
+		return false;
+	};
+	return self;
+});
 var HeavyTower = Container.expand(function () {
 	var self = Container.call(this);
 	var towerGraphics = self.attachAsset('enemyTower', {
 		anchorX: 0.5,
@@ -1561,9 +1770,11 @@
 			// Choose random tower type based on available coins
 			var towerTypes = [];
 			if (this.coins >= 75) towerTypes.push('basic');
 			if (this.coins >= 100) towerTypes.push('fast');
+			if (this.coins >= 110) towerTypes.push('heal');
 			if (this.coins >= 125) towerTypes.push('sniper');
+			if (this.coins >= 130) towerTypes.push('area');
 			if (this.coins >= 150) towerTypes.push('heavy');
 			if (towerTypes.length > 0) {
 				var randomType = towerTypes[Math.floor(Math.random() * towerTypes.length)];
 				var tower = null;
@@ -1576,12 +1787,20 @@
 					case 'fast':
 						tower = new FastTower();
 						cost = 100;
 						break;
+					case 'heal':
+						tower = new HealTower();
+						cost = 110;
+						break;
 					case 'sniper':
 						tower = new SniperTower();
 						cost = 125;
 						break;
+					case 'area':
+						tower = new AreaTower();
+						cost = 130;
+						break;
 					case 'heavy':
 						tower = new HeavyTower();
 						cost = 150;
 						break;
@@ -1692,11 +1911,17 @@
 								switch (enemyTowers[j].towerType) {
 									case 'fast':
 										moneyReward = 100;
 										break;
+									case 'heal':
+										moneyReward = 110;
+										break;
 									case 'sniper':
 										moneyReward = 125;
 										break;
+									case 'area':
+										moneyReward = 130;
+										break;
 									case 'heavy':
 										moneyReward = 150;
 										break;
 									default: