===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,419 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Bullet = Container.expand(function (startX, startY, targetX, targetY, damage) {
+	var self = Container.call(this);
+	self.graphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.x = startX;
+	self.y = startY;
+	self.damage = damage;
+	self.speed = 8;
+	var dx = targetX - startX;
+	var dy = targetY - startY;
+	var distance = Math.sqrt(dx * dx + dy * dy);
+	self.velocityX = dx / distance * self.speed;
+	self.velocityY = dy / distance * self.speed;
+	self.update = function () {
+		self.x += self.velocityX;
+		self.y += self.velocityY;
+	};
+	return self;
+});
+var Enemy = Container.expand(function (enemyType) {
+	var self = Container.call(this);
+	self.enemyType = enemyType;
+	self.health = 60;
+	self.maxHealth = 60;
+	self.damage = 15;
+	self.speed = 1;
+	self.targetX = 1024;
+	self.targetY = 1366;
+	if (enemyType === 'tank') {
+		self.health = 120;
+		self.maxHealth = 120;
+		self.damage = 30;
+		self.speed = 0.8;
+		self.graphics = self.attachAsset('enemyTank', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	} else if (enemyType === 'soldier') {
+		self.health = 50;
+		self.maxHealth = 50;
+		self.damage = 10;
+		self.speed = 1.2;
+		self.graphics = self.attachAsset('enemySoldier', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	}
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		if (self.health <= 0) {
+			self.health = 0;
+			return true;
+		}
+		return false;
+	};
+	self.update = function () {
+		// Move towards base
+		var dx = self.targetX - self.x;
+		var dy = self.targetY - self.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance > 5) {
+			self.x += dx / distance * self.speed;
+			self.y += dy / distance * self.speed;
+		}
+	};
+	return self;
+});
+var GridCell = Container.expand(function (gridX, gridY) {
+	var self = Container.call(this);
+	self.gridX = gridX;
+	self.gridY = gridY;
+	self.occupied = false;
+	self.unit = null;
+	self.graphics = self.attachAsset('gridCell', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		alpha: 0.3
+	});
+	self.down = function (x, y, obj) {
+		if (!self.occupied && playerMoney >= selectedUnitCost) {
+			deployUnit(self.gridX, self.gridY);
+		}
+	};
+	return self;
+});
+var Unit = Container.expand(function (unitType) {
+	var self = Container.call(this);
+	self.unitType = unitType;
+	self.health = 100;
+	self.maxHealth = 100;
+	self.attackDamage = 20;
+	self.attackRange = 150;
+	self.attackCooldown = 0;
+	self.attackSpeed = 60; // frames between attacks
+	self.cost = 50;
+	// Set unit-specific properties
+	if (unitType === 'tank') {
+		self.health = 150;
+		self.maxHealth = 150;
+		self.attackDamage = 40;
+		self.attackRange = 200;
+		self.attackSpeed = 90;
+		self.cost = 100;
+		self.graphics = self.attachAsset('tank', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	} else if (unitType === 'soldier') {
+		self.health = 80;
+		self.maxHealth = 80;
+		self.attackDamage = 15;
+		self.attackRange = 120;
+		self.attackSpeed = 45;
+		self.cost = 30;
+		self.graphics = self.attachAsset('soldier', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	} else if (unitType === 'aircraft') {
+		self.health = 100;
+		self.maxHealth = 100;
+		self.attackDamage = 25;
+		self.attackRange = 250;
+		self.attackSpeed = 60;
+		self.cost = 80;
+		self.graphics = self.attachAsset('aircraft', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	}
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		if (self.health <= 0) {
+			self.health = 0;
+			return true; // unit destroyed
+		}
+		return false;
+	};
+	self.canAttack = function () {
+		return self.attackCooldown <= 0;
+	};
+	self.attack = function (target) {
+		if (self.canAttack()) {
+			self.attackCooldown = self.attackSpeed;
+			return true;
+		}
+		return false;
+	};
+	self.update = function () {
+		if (self.attackCooldown > 0) {
+			self.attackCooldown--;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x2F4F2F
+});
+
+/**** 
+* Game Code
+****/ 
+var GRID_SIZE = 120;
+var GRID_COLS = 8;
+var GRID_ROWS = 6;
+var GRID_START_X = 400;
+var GRID_START_Y = 800;
+// Game state variables
+var playerMoney = 200;
+var currentWave = 1;
+var maxWaves = 10;
+var enemiesThisWave = 0;
+var maxEnemiesThisWave = 3;
+var enemySpawnTimer = 0;
+var enemySpawnDelay = 120;
+var selectedUnitType = 'soldier';
+var selectedUnitCost = 30;
+var gameState = 'playing'; // 'playing', 'gameOver', 'victory'
+var baseHealth = 100;
+var maxBaseHealth = 100;
+// Game arrays
+var playerUnits = [];
+var enemies = [];
+var bullets = [];
+var gridCells = [];
+// Create base
+var base = game.addChild(LK.getAsset('base', {
+	anchorX: 0.5,
+	anchorY: 0.5
+}));
+base.x = 1024;
+base.y = 1366;
+// Create grid
+for (var row = 0; row < GRID_ROWS; row++) {
+	for (var col = 0; col < GRID_COLS; col++) {
+		var cell = new GridCell(col, row);
+		cell.x = GRID_START_X + col * GRID_SIZE;
+		cell.y = GRID_START_Y + row * GRID_SIZE;
+		gridCells.push(cell);
+		game.addChild(cell);
+	}
+}
+// UI Elements
+var moneyText = new Text2('Money: $' + playerMoney, {
+	size: 60,
+	fill: 0xFFFFFF
+});
+moneyText.anchor.set(0, 0);
+moneyText.x = 120;
+moneyText.y = 100;
+LK.gui.topLeft.addChild(moneyText);
+var waveText = new Text2('Wave: ' + currentWave + '/' + maxWaves, {
+	size: 60,
+	fill: 0xFFFFFF
+});
+waveText.anchor.set(0.5, 0);
+LK.gui.top.addChild(waveText);
+var baseHealthText = new Text2('Base Health: ' + baseHealth, {
+	size: 50,
+	fill: 0xFFFFFF
+});
+baseHealthText.anchor.set(0.5, 0);
+baseHealthText.y = 80;
+LK.gui.top.addChild(baseHealthText);
+// Unit selection buttons
+var soldierButton = LK.getAsset('soldier', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	scaleX: 1.5,
+	scaleY: 1.5
+});
+soldierButton.x = 200;
+soldierButton.y = 200;
+LK.gui.topLeft.addChild(soldierButton);
+var tankButton = LK.getAsset('tank', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	scaleX: 1.2,
+	scaleY: 1.2
+});
+tankButton.x = 300;
+tankButton.y = 200;
+LK.gui.topLeft.addChild(tankButton);
+var aircraftButton = LK.getAsset('aircraft', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	scaleX: 1.3,
+	scaleY: 1.3
+});
+aircraftButton.x = 400;
+aircraftButton.y = 200;
+LK.gui.topLeft.addChild(aircraftButton);
+// Button event handlers
+soldierButton.down = function () {
+	selectedUnitType = 'soldier';
+	selectedUnitCost = 30;
+	updateButtonSelection();
+};
+tankButton.down = function () {
+	selectedUnitType = 'tank';
+	selectedUnitCost = 100;
+	updateButtonSelection();
+};
+aircraftButton.down = function () {
+	selectedUnitType = 'aircraft';
+	selectedUnitCost = 80;
+	updateButtonSelection();
+};
+function updateButtonSelection() {
+	soldierButton.alpha = selectedUnitType === 'soldier' ? 1.0 : 0.6;
+	tankButton.alpha = selectedUnitType === 'tank' ? 1.0 : 0.6;
+	aircraftButton.alpha = selectedUnitType === 'aircraft' ? 1.0 : 0.6;
+}
+function deployUnit(gridX, gridY) {
+	if (playerMoney >= selectedUnitCost) {
+		var unit = new Unit(selectedUnitType);
+		unit.x = GRID_START_X + gridX * GRID_SIZE;
+		unit.y = GRID_START_Y + gridY * GRID_SIZE;
+		playerUnits.push(unit);
+		game.addChild(unit);
+		// Mark grid cell as occupied
+		var cellIndex = gridY * GRID_COLS + gridX;
+		gridCells[cellIndex].occupied = true;
+		gridCells[cellIndex].unit = unit;
+		playerMoney -= selectedUnitCost;
+		moneyText.setText('Money: $' + playerMoney);
+		LK.getSound('unitDeploy').play();
+	}
+}
+function spawnEnemy() {
+	var enemyType = Math.random() < 0.6 ? 'soldier' : 'tank';
+	var enemy = new Enemy(enemyType);
+	// Spawn from top of screen
+	enemy.x = Math.random() * 1500 + 200;
+	enemy.y = 100;
+	enemies.push(enemy);
+	game.addChild(enemy);
+	enemiesThisWave++;
+}
+function findNearestEnemy(unit) {
+	var nearestEnemy = null;
+	var nearestDistance = unit.attackRange;
+	for (var i = 0; i < enemies.length; i++) {
+		var enemy = enemies[i];
+		var dx = enemy.x - unit.x;
+		var dy = enemy.y - unit.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance <= nearestDistance) {
+			nearestEnemy = enemy;
+			nearestDistance = distance;
+		}
+	}
+	return nearestEnemy;
+}
+function createBullet(startX, startY, targetX, targetY, damage) {
+	var bullet = new Bullet(startX, startY, targetX, targetY, damage);
+	bullets.push(bullet);
+	game.addChild(bullet);
+	LK.getSound('shoot').play();
+}
+function checkWaveComplete() {
+	if (enemiesThisWave >= maxEnemiesThisWave && enemies.length === 0) {
+		currentWave++;
+		if (currentWave > maxWaves) {
+			gameState = 'victory';
+			LK.showYouWin();
+			return;
+		}
+		// Start next wave
+		enemiesThisWave = 0;
+		maxEnemiesThisWave = Math.min(3 + currentWave, 15);
+		enemySpawnDelay = Math.max(60, 120 - currentWave * 5);
+		playerMoney += 50 + currentWave * 10;
+		waveText.setText('Wave: ' + currentWave + '/' + maxWaves);
+		moneyText.setText('Money: $' + playerMoney);
+	}
+}
+// Initialize selection
+updateButtonSelection();
+game.update = function () {
+	if (gameState !== 'playing') return;
+	// Spawn enemies
+	if (enemiesThisWave < maxEnemiesThisWave) {
+		enemySpawnTimer++;
+		if (enemySpawnTimer >= enemySpawnDelay) {
+			spawnEnemy();
+			enemySpawnTimer = 0;
+		}
+	}
+	// Update units and handle combat
+	for (var i = 0; i < playerUnits.length; i++) {
+		var unit = playerUnits[i];
+		var target = findNearestEnemy(unit);
+		if (target && unit.canAttack()) {
+			if (unit.attack(target)) {
+				createBullet(unit.x, unit.y, target.x, target.y, unit.attackDamage);
+			}
+		}
+	}
+	// Update enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var enemy = enemies[i];
+		// Check if enemy reached base
+		var distanceToBase = Math.sqrt(Math.pow(enemy.x - base.x, 2) + Math.pow(enemy.y - base.y, 2));
+		if (distanceToBase < 100) {
+			baseHealth -= enemy.damage;
+			baseHealthText.setText('Base Health: ' + Math.max(0, baseHealth));
+			if (baseHealth <= 0) {
+				gameState = 'gameOver';
+				LK.showGameOver();
+				return;
+			}
+			enemy.destroy();
+			enemies.splice(i, 1);
+			continue;
+		}
+	}
+	// Update bullets and check collisions
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		var bullet = bullets[i];
+		// Check if bullet is out of bounds
+		if (bullet.x < 0 || bullet.x > 2048 || bullet.y < 0 || bullet.y > 2732) {
+			bullet.destroy();
+			bullets.splice(i, 1);
+			continue;
+		}
+		// Check bullet-enemy collisions
+		for (var j = enemies.length - 1; j >= 0; j--) {
+			var enemy = enemies[j];
+			if (bullet.intersects(enemy)) {
+				if (enemy.takeDamage(bullet.damage)) {
+					playerMoney += 10;
+					moneyText.setText('Money: $' + playerMoney);
+					LK.getSound('enemyHit').play();
+					enemy.destroy();
+					enemies.splice(j, 1);
+				}
+				bullet.destroy();
+				bullets.splice(i, 1);
+				break;
+			}
+		}
+	}
+	checkWaveComplete();
+};
\ No newline at end of file