===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,361 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+var storage = LK.import("@upit/storage.v1");
+
+/**** 
+* Classes
+****/ 
+var DefensiveUnit = Container.expand(function (unitType) {
+	var self = Container.call(this);
+	var unitGraphics = self.attachAsset(unitType, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	if (unitType === 'archer') {
+		self.damage = 15;
+		self.range = 180;
+		self.attackSpeed = 60; // frames between attacks
+		self.cost = 10;
+	} else if (unitType === 'spearman') {
+		self.damage = 25;
+		self.range = 100;
+		self.attackSpeed = 45;
+		self.cost = 15;
+	} else if (unitType === 'cavalry') {
+		self.damage = 35;
+		self.range = 120;
+		self.attackSpeed = 30;
+		self.cost = 25;
+	}
+	self.unitType = unitType;
+	self.attackTimer = 0;
+	self.target = null;
+	self.update = function () {
+		self.attackTimer--;
+		if (self.attackTimer <= 0) {
+			self.findTarget();
+			if (self.target && self.isInRange(self.target)) {
+				self.attack();
+				self.attackTimer = self.attackSpeed;
+			}
+		}
+	};
+	self.findTarget = function () {
+		var closestDistance = self.range;
+		self.target = null;
+		for (var i = 0; i < enemies.length; i++) {
+			var enemy = enemies[i];
+			var distance = Math.sqrt(Math.pow(enemy.x - self.x, 2) + Math.pow(enemy.y - self.y, 2));
+			if (distance < closestDistance) {
+				closestDistance = distance;
+				self.target = enemy;
+			}
+		}
+	};
+	self.isInRange = function (target) {
+		var distance = Math.sqrt(Math.pow(target.x - self.x, 2) + Math.pow(target.y - self.y, 2));
+		return distance <= self.range;
+	};
+	self.attack = function () {
+		if (self.target) {
+			var projectile = new Projectile(self.unitType, self.x, self.y, self.target, self.damage);
+			projectiles.push(projectile);
+			game.addChild(projectile);
+			LK.getSound('attack').play();
+		}
+	};
+	return self;
+});
+var Enemy = Container.expand(function (enemyType) {
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset(enemyType, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	if (enemyType === 'enemy') {
+		self.health = 30;
+		self.maxHealth = 30;
+		self.speed = 1;
+		self.damage = 10;
+		self.coinValue = 2;
+	} else if (enemyType === 'strongEnemy') {
+		self.health = 60;
+		self.maxHealth = 60;
+		self.speed = 0.8;
+		self.damage = 20;
+		self.coinValue = 5;
+	}
+	self.enemyType = enemyType;
+	self.update = function () {
+		// Move toward fortress
+		var dx = fortress.x - self.x;
+		var dy = fortress.y - self.y;
+		var distance = Math.sqrt(dx * dx + dy * dy);
+		if (distance > 75) {
+			// Not at fortress yet
+			self.x += dx / distance * self.speed;
+			self.y += dy / distance * self.speed;
+		} else {
+			// Attack fortress
+			fortress.takeDamage(self.damage);
+			self.markForDestroy = true;
+		}
+	};
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		LK.effects.flashObject(self, 0xFFFFFF, 200);
+		if (self.health <= 0) {
+			coins += self.coinValue;
+			enemiesKilled++;
+			self.markForDestroy = true;
+		}
+	};
+	return self;
+});
+var Fortress = Container.expand(function () {
+	var self = Container.call(this);
+	var fortressGraphics = self.attachAsset('fortress', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 100;
+	self.maxHealth = 100;
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		LK.effects.flashObject(self, 0xFF0000, 300);
+		if (self.health <= 0) {
+			gameOver = true;
+		}
+	};
+	return self;
+});
+var Projectile = Container.expand(function (unitType, startX, startY, target, damage) {
+	var self = Container.call(this);
+	var assetType = unitType === 'archer' ? 'arrow' : 'spear';
+	var projectileGraphics = self.attachAsset(assetType, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.x = startX;
+	self.y = startY;
+	self.target = target;
+	self.damage = damage;
+	self.speed = 8;
+	// Calculate direction to target
+	var dx = target.x - startX;
+	var dy = target.y - startY;
+	var distance = Math.sqrt(dx * dx + dy * dy);
+	self.dirX = dx / distance;
+	self.dirY = dy / distance;
+	// Set rotation to face target
+	projectileGraphics.rotation = Math.atan2(dy, dx);
+	self.update = function () {
+		self.x += self.dirX * self.speed;
+		self.y += self.dirY * self.speed;
+		// Check if hit target
+		if (self.target && Math.sqrt(Math.pow(self.target.x - self.x, 2) + Math.pow(self.target.y - self.y, 2)) < 25) {
+			self.target.takeDamage(self.damage);
+			self.markForDestroy = true;
+		}
+		// Remove if off screen
+		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782) {
+			self.markForDestroy = true;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0xF4A460 // Sandy brown desert background
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var fortress;
+var defensiveUnits = [];
+var enemies = [];
+var projectiles = [];
+var coins = 50;
+var currentWave = 1;
+var enemiesInWave = 5;
+var enemiesSpawned = 0;
+var waveDelay = 180; // 3 seconds at 60fps
+var spawnDelay = 60; // 1 second between enemy spawns
+var gameOver = false;
+var enemiesKilled = 0;
+var selectedUnitType = 'archer';
+// Initialize fortress at center
+fortress = new Fortress();
+fortress.x = 1024;
+fortress.y = 1366;
+game.addChild(fortress);
+// UI Elements
+var coinsText = new Text2('Coins: ' + coins, {
+	size: 40,
+	fill: 0xFFD700
+});
+coinsText.anchor.set(0, 0);
+coinsText.x = 120;
+coinsText.y = 50;
+LK.gui.topLeft.addChild(coinsText);
+var waveText = new Text2('Wave: ' + currentWave, {
+	size: 40,
+	fill: 0xFFFFFF
+});
+waveText.anchor.set(0.5, 0);
+waveText.x = 0;
+waveText.y = 50;
+LK.gui.top.addChild(waveText);
+var healthText = new Text2('Fortress: ' + fortress.health + '/' + fortress.maxHealth, {
+	size: 40,
+	fill: 0xFF0000
+});
+healthText.anchor.set(1, 0);
+healthText.x = -20;
+healthText.y = 50;
+LK.gui.topRight.addChild(healthText);
+// Unit selection buttons
+var archerButton = new Text2('Archer (10)', {
+	size: 35,
+	fill: 0x228B22
+});
+archerButton.anchor.set(0.5, 1);
+archerButton.x = -200;
+archerButton.y = -50;
+LK.gui.bottom.addChild(archerButton);
+var spearmanButton = new Text2('Spearman (15)', {
+	size: 35,
+	fill: 0x4169E1
+});
+spearmanButton.anchor.set(0.5, 1);
+spearmanButton.x = 0;
+spearmanButton.y = -50;
+LK.gui.bottom.addChild(spearmanButton);
+var cavalryButton = new Text2('Cavalry (25)', {
+	size: 35,
+	fill: 0x800080
+});
+cavalryButton.anchor.set(0.5, 1);
+cavalryButton.x = 200;
+cavalryButton.y = -50;
+LK.gui.bottom.addChild(cavalryButton);
+// Button press handlers
+archerButton.down = function () {
+	selectedUnitType = 'archer';
+	updateButtonColors();
+};
+spearmanButton.down = function () {
+	selectedUnitType = 'spearman';
+	updateButtonColors();
+};
+cavalryButton.down = function () {
+	selectedUnitType = 'cavalry';
+	updateButtonColors();
+};
+function updateButtonColors() {
+	archerButton.style.fill = selectedUnitType === 'archer' ? "#00FF00" : "#228B22";
+	spearmanButton.style.fill = selectedUnitType === 'spearman' ? "#00FF00" : "#4169E1";
+	cavalryButton.style.fill = selectedUnitType === 'cavalry' ? "#00FF00" : "#800080";
+}
+updateButtonColors();
+// Game input
+game.down = function (x, y, obj) {
+	if (gameOver) return;
+	var unitCost = selectedUnitType === 'archer' ? 10 : selectedUnitType === 'spearman' ? 15 : 25;
+	if (coins >= unitCost) {
+		var newUnit = new DefensiveUnit(selectedUnitType);
+		newUnit.x = x;
+		newUnit.y = y;
+		defensiveUnits.push(newUnit);
+		game.addChild(newUnit);
+		coins -= unitCost;
+		LK.getSound('deploy').play();
+	}
+};
+// Spawn enemies
+function spawnEnemy() {
+	var enemyType = currentWave > 3 && Math.random() < 0.3 ? 'strongEnemy' : 'enemy';
+	var enemy = new Enemy(enemyType);
+	// Spawn from random edge
+	var side = Math.floor(Math.random() * 4);
+	if (side === 0) {
+		// Top
+		enemy.x = Math.random() * 2048;
+		enemy.y = -50;
+	} else if (side === 1) {
+		// Right
+		enemy.x = 2098;
+		enemy.y = Math.random() * 2732;
+	} else if (side === 2) {
+		// Bottom
+		enemy.x = Math.random() * 2048;
+		enemy.y = 2782;
+	} else {
+		// Left
+		enemy.x = -50;
+		enemy.y = Math.random() * 2732;
+	}
+	enemies.push(enemy);
+	game.addChild(enemy);
+}
+// Start background music
+LK.playMusic('background');
+// Main game update
+game.update = function () {
+	if (gameOver) {
+		LK.showGameOver();
+		return;
+	}
+	// Update UI
+	coinsText.setText('Coins: ' + coins);
+	waveText.setText('Wave: ' + currentWave);
+	healthText.setText('Fortress: ' + fortress.health + '/' + fortress.maxHealth);
+	LK.setScore(enemiesKilled);
+	// Spawn enemies for current wave
+	if (enemiesSpawned < enemiesInWave && LK.ticks % spawnDelay === 0) {
+		spawnEnemy();
+		enemiesSpawned++;
+	}
+	// Check if wave is complete
+	if (enemiesSpawned >= enemiesInWave && enemies.length === 0) {
+		if (waveDelay > 0) {
+			waveDelay--;
+		} else {
+			// Start next wave
+			currentWave++;
+			enemiesInWave = Math.min(5 + currentWave * 2, 20);
+			enemiesSpawned = 0;
+			waveDelay = 180;
+			spawnDelay = Math.max(30, 60 - currentWave * 2);
+		}
+	}
+	// Update defensive units
+	for (var i = 0; i < defensiveUnits.length; i++) {
+		defensiveUnits[i].update();
+	}
+	// Update enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var enemy = enemies[i];
+		enemy.update();
+		if (enemy.markForDestroy) {
+			enemy.destroy();
+			enemies.splice(i, 1);
+		}
+	}
+	// Update projectiles
+	for (var i = projectiles.length - 1; i >= 0; i--) {
+		var projectile = projectiles[i];
+		projectile.update();
+		if (projectile.markForDestroy) {
+			projectile.destroy();
+			projectiles.splice(i, 1);
+		}
+	}
+};
\ No newline at end of file