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

/**** 
* Classes
****/ 
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.damage = 25;
	self.target = null;
	self.hasHit = false;
	self.update = function () {
		if (!self.target || self.hasHit) return;
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 20) {
			if (self.isSplash) {
				// Splash damage to all enemies in radius
				for (var i = 0; i < enemies.length; i++) {
					var enemy = enemies[i];
					if (enemy.isDead || enemy.reachedBase) continue;
					var splashDx = enemy.x - self.x;
					var splashDy = enemy.y - self.y;
					var splashDistance = Math.sqrt(splashDx * splashDx + splashDy * splashDy);
					if (splashDistance <= self.splashRadius) {
						enemy.takeDamage(self.damage);
					}
				}
			} else if (self.isMagic) {
				// Magic damage with slow effect
				self.target.takeDamage(self.damage);
				self.target.applySlow(self.slowEffect, self.slowDuration);
			} else {
				// Regular damage
				self.target.takeDamage(self.damage);
			}
			self.hasHit = true;
			LK.getSound('enemyHit').play();
			return;
		}
		var moveX = dx / distance * self.speed;
		var moveY = dy / distance * self.speed;
		self.x += moveX;
		self.y += moveY;
	};
	return self;
});
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.maxHealth = 100;
	self.health = self.maxHealth;
	self.speed = 2;
	self.reward = 10;
	self.pathIndex = 0;
	self.isDead = false;
	self.reachedBase = false;
	self.originalSpeed = self.speed;
	self.slowEndTime = 0;
	self.isSlowed = false;
	// Add health bar
	var healthBarBg = LK.getAsset('pathTile', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.6,
		scaleY: 0.1
	});
	healthBarBg.y = -40;
	healthBarBg.tint = 0x333333;
	self.addChild(healthBarBg);
	var healthBar = LK.getAsset('grassTile', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.6,
		scaleY: 0.1
	});
	healthBar.y = -40;
	healthBar.tint = 0x00FF00;
	self.addChild(healthBar);
	self.updateHealthBar = function () {
		var healthPercent = self.health / self.maxHealth;
		healthBar.scaleX = 0.6 * healthPercent;
		if (healthPercent > 0.6) {
			healthBar.tint = 0x00FF00; // Green
		} else if (healthPercent > 0.3) {
			healthBar.tint = 0xFFFF00; // Yellow
		} else {
			healthBar.tint = 0xFF0000; // Red
		}
	};
	self.applySlow = function (slowFactor, duration) {
		self.speed = self.originalSpeed * slowFactor;
		self.slowEndTime = LK.ticks + duration;
		self.isSlowed = true;
		enemyGraphics.tint = 0x3498db; // Blue tint for slowed enemies
	};
	self.takeDamage = function (damage) {
		self.health -= damage;
		self.updateHealthBar();
		if (self.health <= 0 && !self.isDead) {
			self.isDead = true;
			LK.getSound('enemyDeath').play();
			currency += self.reward;
			updateUI();
			// Death animation
			tween(enemyGraphics, {
				alpha: 0,
				scaleX: 0.1,
				scaleY: 0.1
			}, {
				duration: 500
			});
		}
	};
	self.update = function () {
		if (self.isDead || self.reachedBase) return;
		// Check if slow effect should end
		if (self.isSlowed && LK.ticks >= self.slowEndTime) {
			self.speed = self.originalSpeed;
			self.isSlowed = false;
			enemyGraphics.tint = 0xFFFFFF; // Reset tint
		}
		if (self.pathIndex < enemyPath.length) {
			var target = enemyPath[self.pathIndex];
			var dx = target.x - self.x;
			var dy = target.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance < 20) {
				self.pathIndex++;
				if (self.pathIndex >= enemyPath.length) {
					self.reachedBase = true;
					lives--;
					updateUI();
					return;
				}
			}
			var moveX = dx / distance * self.speed;
			var moveY = dy / distance * self.speed;
			self.x += moveX;
			self.y += moveY;
		}
	};
	return self;
});
var MagicWarrior = Enemy.expand(function () {
	var self = Enemy.call(this);
	// Replace graphics with magic warrior
	self.removeChildAt(0);
	var enemyGraphics = self.attachAsset('magicWarrior', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.maxHealth = 120;
	self.health = self.maxHealth;
	self.speed = 2.2;
	self.originalSpeed = self.speed;
	self.reward = 20;
	self.enemyType = 'magic';
	self.magicResistance = 0.5; // Takes 50% less damage from magic towers
	self.takeDamage = function (damage, damageType) {
		var actualDamage = damage;
		if (damageType === 'magic') {
			actualDamage = damage * self.magicResistance;
		}
		self.health -= actualDamage;
		self.updateHealthBar();
		if (self.health <= 0 && !self.isDead) {
			self.isDead = true;
			LK.getSound('enemyDeath').play();
			currency += self.reward;
			updateUI();
			tween(enemyGraphics, {
				alpha: 0,
				scaleX: 0.1,
				scaleY: 0.1
			}, {
				duration: 500
			});
		}
	};
	return self;
});
var HeavyWarrior = Enemy.expand(function () {
	var self = Enemy.call(this);
	// Replace graphics with heavy warrior
	self.removeChildAt(0);
	var enemyGraphics = self.attachAsset('heavyWarrior', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.maxHealth = 200;
	self.health = self.maxHealth;
	self.speed = 1.0;
	self.originalSpeed = self.speed;
	self.reward = 25;
	self.enemyType = 'heavy';
	return self;
});
var FastWarrior = Enemy.expand(function () {
	var self = Enemy.call(this);
	// Replace graphics with fast warrior
	self.removeChildAt(0);
	var enemyGraphics = self.attachAsset('fastWarrior', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.maxHealth = 60;
	self.health = self.maxHealth;
	self.speed = 3.5;
	self.originalSpeed = self.speed;
	self.reward = 15;
	self.enemyType = 'fast';
	return self;
});
var Tower = Container.expand(function () {
	var self = Container.call(this);
	var towerGraphics = self.attachAsset('tower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.range = 150;
	self.damage = 25;
	self.fireRate = 60;
	self.lastFire = 0;
	self.cost = 50;
	self.level = 1;
	self.maxLevel = 3;
	self.showingRange = false;
	self.upgradeCost = 75;
	var rangeIndicator = self.attachAsset('towerRange', {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.3
	});
	rangeIndicator.width = self.range * 2;
	rangeIndicator.height = self.range * 2;
	rangeIndicator.visible = false;
	self.showRange = function () {
		rangeIndicator.visible = true;
		self.showingRange = true;
	};
	self.hideRange = function () {
		rangeIndicator.visible = false;
		self.showingRange = false;
	};
	self.findTarget = function () {
		var closestEnemy = null;
		var closestDistance = Infinity;
		for (var i = 0; i < enemies.length; i++) {
			var enemy = enemies[i];
			if (enemy.isDead || enemy.reachedBase) continue;
			var dx = enemy.x - self.x;
			var dy = enemy.y - self.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			if (distance <= self.range && distance < closestDistance) {
				closestDistance = distance;
				closestEnemy = enemy;
			}
		}
		return closestEnemy;
	};
	self.fire = function (target) {
		if (LK.ticks - self.lastFire < self.fireRate) return;
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.target = target;
		bullet.damage = self.damage;
		// Bullet spawn animation
		bullet.alpha = 0;
		bullet.scaleX = 0.5;
		bullet.scaleY = 0.5;
		bullets.push(bullet);
		game.addChild(bullet);
		// Animate bullet appearance
		tween(bullet, {
			alpha: 1,
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 100,
			easing: tween.easeOut
		});
		// Tower fire animation
		var originalScale = towerGraphics.scaleX;
		tween(towerGraphics, {
			scaleX: 1.2,
			scaleY: 1.2
		}, {
			duration: 100,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(towerGraphics, {
					scaleX: originalScale,
					scaleY: originalScale
				}, {
					duration: 100,
					easing: tween.easeIn
				});
			}
		});
		self.lastFire = LK.ticks;
		LK.getSound('shoot').play();
	};
	self.upgrade = function () {
		if (self.level >= self.maxLevel || currency < self.upgradeCost) return false;
		currency -= self.upgradeCost;
		self.level++;
		self.damage += 15;
		self.range += 25;
		self.fireRate = Math.max(30, self.fireRate - 10);
		self.upgradeCost = Math.floor(self.upgradeCost * 1.5);
		// Update range indicator
		rangeIndicator.width = self.range * 2;
		rangeIndicator.height = self.range * 2;
		// Visual upgrade indicator
		towerGraphics.tint = self.level === 2 ? 0x3A7BD5 : 0x2E5BBA;
		updateUI();
		return true;
	};
	self.down = function (x, y, obj) {
		// Always start dragging on click
		draggingTower = self;
		selectedTower = self;
		// Use x, y parameters directly instead of trying to convert coordinates
		dragOffset.x = x - self.x;
		dragOffset.y = y - self.y;
		originalTowerPosition.x = self.x;
		originalTowerPosition.y = self.y;
		// Find original grid position
		var gridPos = getGridPosition(self.x, self.y);
		if (gridPos) {
			originalGridPosition.x = gridPos.x;
			originalGridPosition.y = gridPos.y;
			grid[gridPos.x][gridPos.y].occupied = false;
		}
		// Add drag visual effect
		tween(self, {
			alpha: 0.7,
			scaleX: 1.1,
			scaleY: 1.1
		}, {
			duration: 200
		});
		hideAllRanges();
		self.showRange();
	};
	self.update = function () {
		var target = self.findTarget();
		if (target) {
			self.fire(target);
		}
	};
	return self;
});
var MagicTower = Tower.expand(function () {
	var self = Tower.call(this);
	// Replace graphics with magic tower
	self.removeChildAt(0);
	var towerGraphics = self.attachAsset('magicTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.range = 130;
	self.damage = 20;
	self.fireRate = 50;
	self.cost = 80;
	self.upgradeCost = 120;
	self.towerType = 'magic';
	self.slowEffect = 0.5;
	self.slowDuration = 120;
	// Update range indicator
	var rangeIndicator = self.children[self.children.length - 1];
	rangeIndicator.width = self.range * 2;
	rangeIndicator.height = self.range * 2;
	rangeIndicator.tint = 0xe67e22;
	self.fire = function (target) {
		if (LK.ticks - self.lastFire < self.fireRate) return;
		// Create slowing bullet
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.target = target;
		bullet.damage = self.damage;
		bullet.slowEffect = self.slowEffect;
		bullet.slowDuration = self.slowDuration;
		bullet.isMagic = true;
		bullets.push(bullet);
		game.addChild(bullet);
		self.lastFire = LK.ticks;
		LK.getSound('shoot').play();
	};
	self.upgrade = function () {
		if (self.level >= self.maxLevel || currency < self.upgradeCost) return false;
		currency -= self.upgradeCost;
		self.level++;
		self.damage += 12;
		self.range += 25;
		self.slowEffect = Math.max(0.2, self.slowEffect - 0.1);
		self.slowDuration += 30;
		self.fireRate = Math.max(30, self.fireRate - 10);
		self.upgradeCost = Math.floor(self.upgradeCost * 1.5);
		rangeIndicator.width = self.range * 2;
		rangeIndicator.height = self.range * 2;
		towerGraphics.tint = self.level === 2 ? 0xD35400 : 0xA04000;
		updateUI();
		return true;
	};
	return self;
});
var CannonTower = Tower.expand(function () {
	var self = Tower.call(this);
	// Replace graphics with cannon tower
	self.removeChildAt(0);
	var towerGraphics = self.attachAsset('cannonTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.range = 120;
	self.damage = 40;
	self.fireRate = 90;
	self.cost = 100;
	self.upgradeCost = 150;
	self.towerType = 'cannon';
	self.splashRadius = 80;
	// Update range indicator
	var rangeIndicator = self.children[self.children.length - 1];
	rangeIndicator.width = self.range * 2;
	rangeIndicator.height = self.range * 2;
	rangeIndicator.tint = 0x34495e;
	self.fire = function (target) {
		if (LK.ticks - self.lastFire < self.fireRate) return;
		// Create splash damage bullet
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		bullet.target = target;
		bullet.damage = self.damage;
		bullet.splashRadius = self.splashRadius;
		bullet.isSplash = true;
		bullets.push(bullet);
		game.addChild(bullet);
		self.lastFire = LK.ticks;
		LK.getSound('shoot').play();
	};
	self.upgrade = function () {
		if (self.level >= self.maxLevel || currency < self.upgradeCost) return false;
		currency -= self.upgradeCost;
		self.level++;
		self.damage += 20;
		self.range += 20;
		self.splashRadius += 20;
		self.fireRate = Math.max(60, self.fireRate - 15);
		self.upgradeCost = Math.floor(self.upgradeCost * 1.5);
		rangeIndicator.width = self.range * 2;
		rangeIndicator.height = self.range * 2;
		towerGraphics.tint = self.level === 2 ? 0x2C3E50 : 0x1B2631;
		updateUI();
		return true;
	};
	return self;
});
var ArcherTower = Tower.expand(function () {
	var self = Tower.call(this);
	// Replace graphics with archer tower
	self.removeChildAt(0);
	var towerGraphics = self.attachAsset('archerTower', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.range = 200;
	self.damage = 15;
	self.fireRate = 40;
	self.cost = 75;
	self.upgradeCost = 100;
	self.towerType = 'archer';
	// Update range indicator
	var rangeIndicator = self.children[self.children.length - 1];
	rangeIndicator.width = self.range * 2;
	rangeIndicator.height = self.range * 2;
	rangeIndicator.tint = 0x8e44ad;
	self.upgrade = function () {
		if (self.level >= self.maxLevel || currency < self.upgradeCost) return false;
		currency -= self.upgradeCost;
		self.level++;
		self.damage += 10;
		self.range += 30;
		self.fireRate = Math.max(25, self.fireRate - 5);
		self.upgradeCost = Math.floor(self.upgradeCost * 1.5);
		rangeIndicator.width = self.range * 2;
		rangeIndicator.height = self.range * 2;
		towerGraphics.tint = self.level === 2 ? 0x7D3C98 : 0x6C3483;
		updateUI();
		return true;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
var gridSize = 100;
var mapWidth = 20;
var mapHeight = 25;
var currency = 390;
var lives = 20;
var wave = 1;
var enemiesInWave = 5;
var enemiesSpawned = 0;
var waveActive = false;
var gameOver = false;
var towers = [];
var enemies = [];
var bullets = [];
var grid = [];
var enemyPath = [];
var selectedTower = null;
var placingTower = false;
var selectedTowerType = 'basic';
var draggingTower = null;
var dragOffset = {
	x: 0,
	y: 0
};
var originalTowerPosition = {
	x: 0,
	y: 0
};
var originalGridPosition = {
	x: 0,
	y: 0
};
// Create UI elements
var currencyTxt = new Text2('Gold: 390', {
	size: 60,
	fill: 0xFFD700
});
currencyTxt.anchor.set(0, 0);
currencyTxt.x = 120;
currencyTxt.y = 20;
LK.gui.topLeft.addChild(currencyTxt);
var livesTxt = new Text2('Lives: 20', {
	size: 60,
	fill: 0xFF0000
});
livesTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(livesTxt);
var waveTxt = new Text2('Wave: 1', {
	size: 60,
	fill: 0xFFFFFF
});
waveTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(waveTxt);
var startWaveBtn = new Text2('Start Wave', {
	size: 80,
	fill: 0x00FF00
});
startWaveBtn.anchor.set(0.5, 1);
startWaveBtn.y = -20;
LK.gui.bottom.addChild(startWaveBtn);
var buyTowerBtn = new Text2('Basic Tower (50g)', {
	size: 60,
	fill: 0x4A90E2
});
buyTowerBtn.anchor.set(0, 1);
buyTowerBtn.x = 20;
buyTowerBtn.y = -20;
LK.gui.bottomLeft.addChild(buyTowerBtn);
var buyArcherBtn = new Text2('Archer Tower (75g)', {
	size: 60,
	fill: 0x8e44ad
});
buyArcherBtn.anchor.set(0, 1);
buyArcherBtn.x = 20;
buyArcherBtn.y = -80;
LK.gui.bottomLeft.addChild(buyArcherBtn);
var buyCannonBtn = new Text2('Cannon Tower (100g)', {
	size: 60,
	fill: 0x34495e
});
buyCannonBtn.anchor.set(0, 1);
buyCannonBtn.x = 20;
buyCannonBtn.y = -140;
LK.gui.bottomLeft.addChild(buyCannonBtn);
var buyMagicBtn = new Text2('Magic Tower (80g)', {
	size: 60,
	fill: 0xe67e22
});
buyMagicBtn.anchor.set(0, 1);
buyMagicBtn.x = 20;
buyMagicBtn.y = -200;
LK.gui.bottomLeft.addChild(buyMagicBtn);
var upgradeTowerBtn = new Text2('Upgrade Tower', {
	size: 70,
	fill: 0xFF6B35
});
upgradeTowerBtn.anchor.set(0, 1);
upgradeTowerBtn.x = 20;
upgradeTowerBtn.y = -100;
upgradeTowerBtn.visible = false;
LK.gui.bottomLeft.addChild(upgradeTowerBtn);
function updateUI() {
	currencyTxt.setText('Gold: ' + currency);
	livesTxt.setText('Lives: ' + lives);
	waveTxt.setText('Wave: ' + wave);
	if (currency >= 50) {
		buyTowerBtn.tint = 0x4A90E2;
	} else {
		buyTowerBtn.tint = 0x666666;
	}
	if (currency >= 75) {
		buyArcherBtn.tint = 0x8e44ad;
	} else {
		buyArcherBtn.tint = 0x666666;
	}
	if (currency >= 100) {
		buyCannonBtn.tint = 0x34495e;
	} else {
		buyCannonBtn.tint = 0x666666;
	}
	if (currency >= 80) {
		buyMagicBtn.tint = 0xe67e22;
	} else {
		buyMagicBtn.tint = 0x666666;
	}
	// Update upgrade button visibility and state
	if (selectedTower && selectedTower.level < selectedTower.maxLevel) {
		upgradeTowerBtn.visible = true;
		upgradeTowerBtn.setText('Upgrade Lv' + selectedTower.level + ' (' + selectedTower.upgradeCost + 'g)');
		if (currency >= selectedTower.upgradeCost) {
			upgradeTowerBtn.tint = 0xFF6B35;
		} else {
			upgradeTowerBtn.tint = 0x666666;
		}
	} else {
		upgradeTowerBtn.visible = false;
	}
}
function hideAllRanges() {
	for (var i = 0; i < towers.length; i++) {
		towers[i].hideRange();
	}
}
function initializeGrid() {
	for (var x = 0; x < mapWidth; x++) {
		grid[x] = [];
		for (var y = 0; y < mapHeight; y++) {
			grid[x][y] = {
				x: x * gridSize + gridSize / 2,
				y: y * gridSize + gridSize / 2,
				occupied: false,
				isPath: false
			};
		}
	}
}
function createPath() {
	enemyPath = [];
	var pathCoords = [{
		x: 0,
		y: 12
	}, {
		x: 1,
		y: 12
	}, {
		x: 2,
		y: 12
	}, {
		x: 3,
		y: 12
	}, {
		x: 4,
		y: 12
	}, {
		x: 5,
		y: 12
	}, {
		x: 6,
		y: 12
	}, {
		x: 7,
		y: 12
	}, {
		x: 8,
		y: 12
	}, {
		x: 8,
		y: 11
	}, {
		x: 8,
		y: 10
	}, {
		x: 8,
		y: 9
	}, {
		x: 8,
		y: 8
	}, {
		x: 9,
		y: 8
	}, {
		x: 10,
		y: 8
	}, {
		x: 11,
		y: 8
	}, {
		x: 12,
		y: 8
	}, {
		x: 12,
		y: 9
	}, {
		x: 12,
		y: 10
	}, {
		x: 12,
		y: 11
	}, {
		x: 12,
		y: 12
	}, {
		x: 13,
		y: 12
	}, {
		x: 14,
		y: 12
	}, {
		x: 15,
		y: 12
	}, {
		x: 16,
		y: 12
	}, {
		x: 17,
		y: 12
	}, {
		x: 18,
		y: 12
	}, {
		x: 19,
		y: 12
	}];
	for (var i = 0; i < pathCoords.length; i++) {
		var coord = pathCoords[i];
		if (coord.x < mapWidth && coord.y < mapHeight) {
			grid[coord.x][coord.y].isPath = true;
			enemyPath.push({
				x: coord.x * gridSize + gridSize / 2,
				y: coord.y * gridSize + gridSize / 2
			});
		}
	}
}
function drawMap() {
	for (var x = 0; x < mapWidth; x++) {
		for (var y = 0; y < mapHeight; y++) {
			var tile;
			if (grid[x][y].isPath) {
				tile = LK.getAsset('pathTile', {
					x: x * gridSize,
					y: y * gridSize
				});
			} else {
				tile = LK.getAsset('grassTile', {
					x: x * gridSize,
					y: y * gridSize
				});
			}
			game.addChild(tile);
		}
	}
}
function drawBase() {
	var base = LK.getAsset('base', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: (mapWidth - 1) * gridSize + gridSize / 2,
		y: 12 * gridSize + gridSize / 2
	});
	game.addChild(base);
}
function spawnEnemy() {
	if (enemiesSpawned >= enemiesInWave) return;
	var enemy;
	var enemyType = Math.floor(Math.random() * 4);
	if (enemyType === 0) {
		enemy = new Enemy();
	} else if (enemyType === 1) {
		enemy = new FastWarrior();
	} else if (enemyType === 2) {
		enemy = new HeavyWarrior();
	} else {
		enemy = new MagicWarrior();
	}
	enemy.x = gridSize / 2;
	enemy.y = 12 * gridSize + gridSize / 2;
	// Scale stats with wave
	enemy.health = enemy.maxHealth + (wave - 1) * 20;
	enemy.maxHealth = enemy.health;
	enemy.speed = enemy.originalSpeed + (wave - 1) * 0.2;
	enemy.originalSpeed = enemy.speed;
	enemy.reward = enemy.reward + (wave - 1) * 2;
	// Spawn animation
	enemy.alpha = 0;
	enemy.scaleX = 0.1;
	enemy.scaleY = 0.1;
	enemies.push(enemy);
	game.addChild(enemy);
	// Animate enemy entrance
	tween(enemy, {
		alpha: 1,
		scaleX: 1,
		scaleY: 1
	}, {
		duration: 500,
		easing: tween.bounceOut
	});
	enemiesSpawned++;
}
function getGridPosition(x, y) {
	var gridX = Math.floor(x / gridSize);
	var gridY = Math.floor(y / gridSize);
	if (gridX >= 0 && gridX < mapWidth && gridY >= 0 && gridY < mapHeight) {
		return {
			x: gridX,
			y: gridY
		};
	}
	return null;
}
function canPlaceTower(gridX, gridY) {
	return !grid[gridX][gridY].occupied && !grid[gridX][gridY].isPath;
}
function placeTower(gridX, gridY) {
	var tower;
	var cost;
	if (selectedTowerType === 'basic') {
		cost = 50;
		if (!canPlaceTower(gridX, gridY) || currency < cost) return false;
		tower = new Tower();
	} else if (selectedTowerType === 'archer') {
		cost = 75;
		if (!canPlaceTower(gridX, gridY) || currency < cost) return false;
		tower = new ArcherTower();
	} else if (selectedTowerType === 'cannon') {
		cost = 100;
		if (!canPlaceTower(gridX, gridY) || currency < cost) return false;
		tower = new CannonTower();
	} else if (selectedTowerType === 'magic') {
		cost = 80;
		if (!canPlaceTower(gridX, gridY) || currency < cost) return false;
		tower = new MagicTower();
	}
	tower.x = gridX * gridSize + gridSize / 2;
	tower.y = gridY * gridSize + gridSize / 2;
	// Placement animation
	tower.alpha = 0;
	tower.scaleX = 0.1;
	tower.scaleY = 0.1;
	towers.push(tower);
	game.addChild(tower);
	// Animate tower placement
	tween(tower, {
		alpha: 1,
		scaleX: 1.2,
		scaleY: 1.2
	}, {
		duration: 300,
		easing: tween.easeOut,
		onFinish: function onFinish() {
			tween(tower, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 200,
				easing: tween.easeIn
			});
		}
	});
	grid[gridX][gridY].occupied = true;
	currency -= cost;
	placingTower = false;
	updateUI();
	return true;
}
function startWave() {
	if (waveActive) return;
	waveActive = true;
	enemiesSpawned = 0;
	enemiesInWave = 5 + wave * 2;
	startWaveBtn.setText('Wave Active');
	startWaveBtn.tint = 0x666666;
	// Wave start animation
	tween(startWaveBtn, {
		scaleX: 1.2,
		scaleY: 1.2
	}, {
		duration: 300,
		easing: tween.bounceOut,
		onFinish: function onFinish() {
			tween(startWaveBtn, {
				scaleX: 1,
				scaleY: 1
			}, {
				duration: 200,
				easing: tween.easeIn
			});
		}
	});
	// Screen flash effect for wave start
	LK.effects.flashScreen(0x00FF00, 300);
}
function checkWaveComplete() {
	if (!waveActive) return;
	var allEnemiesGone = true;
	for (var i = 0; i < enemies.length; i++) {
		if (!enemies[i].isDead && !enemies[i].reachedBase) {
			allEnemiesGone = false;
			break;
		}
	}
	if (enemiesSpawned >= enemiesInWave && allEnemiesGone) {
		waveActive = false;
		wave++;
		currency += 25;
		startWaveBtn.setText('Start Wave');
		startWaveBtn.tint = 0x00FF00;
		updateUI();
		// Clean up dead enemies
		for (var i = enemies.length - 1; i >= 0; i--) {
			if (enemies[i].isDead || enemies[i].reachedBase) {
				enemies[i].destroy();
				enemies.splice(i, 1);
			}
		}
	}
}
// Initialize game
initializeGrid();
createPath();
drawMap();
drawBase();
updateUI();
// Event handlers
startWaveBtn.down = function () {
	startWave();
};
buyTowerBtn.down = function () {
	if (currency >= 50) {
		selectedTowerType = 'basic';
		placingTower = true;
		selectedTower = null;
		hideAllRanges();
		updateUI();
	}
};
buyArcherBtn.down = function () {
	if (currency >= 75) {
		selectedTowerType = 'archer';
		placingTower = true;
		selectedTower = null;
		hideAllRanges();
		updateUI();
	}
};
buyCannonBtn.down = function () {
	if (currency >= 100) {
		selectedTowerType = 'cannon';
		placingTower = true;
		selectedTower = null;
		hideAllRanges();
		updateUI();
	}
};
buyMagicBtn.down = function () {
	if (currency >= 80) {
		selectedTowerType = 'magic';
		placingTower = true;
		selectedTower = null;
		hideAllRanges();
		updateUI();
	}
};
upgradeTowerBtn.down = function () {
	if (selectedTower && selectedTower.upgrade()) {
		updateUI();
	}
};
game.move = function (x, y, obj) {
	if (draggingTower) {
		draggingTower.x = x - dragOffset.x;
		draggingTower.y = y - dragOffset.y;
		// Visual feedback for valid/invalid placement
		var gridPos = getGridPosition(draggingTower.x, draggingTower.y);
		if (gridPos && canPlaceTower(gridPos.x, gridPos.y)) {
			draggingTower.tint = 0x00FF00; // Green for valid
		} else {
			draggingTower.tint = 0xFF0000; // Red for invalid
		}
	}
};
game.down = function (x, y, obj) {
	if (placingTower) {
		var gridPos = getGridPosition(x, y);
		if (gridPos) {
			placeTower(gridPos.x, gridPos.y);
		}
	} else {
		// Clear tower selection if clicking on empty space
		var gridPos = getGridPosition(x, y);
		if (gridPos && !grid[gridPos.x][gridPos.y].occupied) {
			selectedTower = null;
			hideAllRanges();
			updateUI();
		}
	}
};
game.up = function (x, y, obj) {
	if (draggingTower) {
		var gridPos = getGridPosition(draggingTower.x, draggingTower.y);
		var canPlace = gridPos && canPlaceTower(gridPos.x, gridPos.y);
		if (canPlace) {
			// Successfully place tower at new position
			draggingTower.x = gridPos.x * gridSize + gridSize / 2;
			draggingTower.y = gridPos.y * gridSize + gridSize / 2;
			grid[gridPos.x][gridPos.y].occupied = true;
			// Smooth placement animation
			tween(draggingTower, {
				alpha: 1,
				scaleX: 1,
				scaleY: 1,
				tint: 0xFFFFFF
			}, {
				duration: 300,
				easing: tween.bounceOut
			});
		} else {
			// Return to original position
			tween(draggingTower, {
				x: originalTowerPosition.x,
				y: originalTowerPosition.y,
				alpha: 1,
				scaleX: 1,
				scaleY: 1,
				tint: 0xFFFFFF
			}, {
				duration: 400,
				easing: tween.elasticOut
			});
			// Restore original grid position
			grid[originalGridPosition.x][originalGridPosition.y].occupied = true;
		}
		draggingTower = null;
	}
};
// Main game loop
game.update = function () {
	if (lives <= 0 && !gameOver) {
		gameOver = true;
		LK.showGameOver();
		return;
	}
	if (wave > 20) {
		LK.showYouWin();
		return;
	}
	// Spawn enemies during wave with decreasing interval
	var spawnInterval = Math.max(45, 90 - wave * 2);
	if (waveActive && LK.ticks % spawnInterval === 0) {
		spawnEnemy();
	}
	// Clean up bullets that hit targets
	for (var i = bullets.length - 1; i >= 0; i--) {
		var bullet = bullets[i];
		if (bullet.hasHit || !bullet.target || bullet.target.isDead) {
			bullet.destroy();
			bullets.splice(i, 1);
		}
	}
	checkWaveComplete();
};

===================================================================
--- original.js
+++ change.js
@@ -113,13 +113,15 @@
 			LK.getSound('enemyDeath').play();
 			currency += self.reward;
 			updateUI();
 			// Death animation
-			tween.to(enemyGraphics, {
+			tween(enemyGraphics, {
 				alpha: 0,
 				scaleX: 0.1,
 				scaleY: 0.1
-			}, 500);
+			}, {
+				duration: 500
+			});
 		}
 	};
 	self.update = function () {
 		if (self.isDead || self.reachedBase) return;
@@ -177,13 +179,15 @@
 			self.isDead = true;
 			LK.getSound('enemyDeath').play();
 			currency += self.reward;
 			updateUI();
-			tween.to(enemyGraphics, {
+			tween(enemyGraphics, {
 				alpha: 0,
 				scaleX: 0.1,
 				scaleY: 0.1
-			}, 500);
+			}, {
+				duration: 500
+			});
 		}
 	};
 	return self;
 });