===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,411 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+var storage = LK.import("@upit/storage.v1");
+
+/**** 
+* Classes
+****/ 
+var Bart = Container.expand(function () {
+	var self = Container.call(this);
+	var bartGraphics = self.attachAsset('bart', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.maxHealth = 100;
+	self.health = self.maxHealth;
+	self.level = 1;
+	self.xp = 0;
+	self.xpToNext = 100;
+	self.damage = 10;
+	self.fireRate = 30;
+	self.fireTimer = 0;
+	self.coins = 0;
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		LK.effects.flashObject(self, 0xFF0000, 500);
+		if (self.health <= 0) {
+			LK.showGameOver();
+		}
+	};
+	self.gainXP = function (amount) {
+		self.xp += amount;
+		while (self.xp >= self.xpToNext) {
+			self.xp -= self.xpToNext;
+			self.level++;
+			self.xpToNext = self.level * 100;
+			self.maxHealth += 20;
+			self.health = self.maxHealth;
+			self.damage += 5;
+			self.fireRate = Math.max(10, self.fireRate - 2);
+			LK.getSound('levelup').play();
+			LK.effects.flashScreen(0xFFFF00, 300);
+		}
+	};
+	self.update = function () {
+		self.fireTimer--;
+	};
+	return self;
+});
+var Boss = Container.expand(function () {
+	var self = Container.call(this);
+	var bossGraphics = self.attachAsset('boss', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.maxHealth = 500;
+	self.health = self.maxHealth;
+	self.speed = 1;
+	self.xpValue = 100;
+	self.coinChance = 1;
+	self.powerupChance = 0.5;
+	var healthBarBg = self.attachAsset('healthbar_bg', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		y: -100
+	});
+	self.healthBarFill = self.attachAsset('healthbar_fill', {
+		anchorX: 0,
+		anchorY: 0.5,
+		x: -100,
+		y: -100
+	});
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		LK.effects.flashObject(self, 0xFFFFFF, 200);
+		self.healthBarFill.scaleX = Math.max(0, self.health / self.maxHealth);
+		if (self.health <= 0) {
+			self.shouldDestroy = true;
+			LK.getSound('hit').play();
+		}
+	};
+	self.update = function () {
+		if (bart) {
+			var dx = bart.x - self.x;
+			var dy = bart.y - self.y;
+			var dist = Math.sqrt(dx * dx + dy * dy);
+			if (dist > 0) {
+				self.x += dx / dist * self.speed;
+				self.y += dy / dist * self.speed;
+			}
+		}
+	};
+	return self;
+});
+var Bullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.damage = 10;
+	self.speed = 15;
+	self.target = null;
+	self.lifetime = 60;
+	self.update = function () {
+		self.lifetime--;
+		if (self.lifetime <= 0) {
+			self.shouldDestroy = true;
+			return;
+		}
+		if (self.target && !self.target.destroyed) {
+			var dx = self.target.x - self.x;
+			var dy = self.target.y - self.y;
+			var dist = Math.sqrt(dx * dx + dy * dy);
+			if (dist > 0) {
+				self.x += dx / dist * self.speed;
+				self.y += dy / dist * self.speed;
+			}
+		} else {
+			self.y -= self.speed;
+		}
+	};
+	return self;
+});
+var Coin = Container.expand(function () {
+	var self = Container.call(this);
+	var coinGraphics = self.attachAsset('coin', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.value = 5;
+	self.lifetime = 300;
+	self.update = function () {
+		self.lifetime--;
+		if (self.lifetime <= 0) {
+			self.shouldDestroy = true;
+		}
+		self.rotation += 0.05;
+	};
+	return self;
+});
+var Mutant = Container.expand(function () {
+	var self = Container.call(this);
+	var mutantGraphics = self.attachAsset('mutant', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.maxHealth = 30;
+	self.health = self.maxHealth;
+	self.speed = 2;
+	self.xpValue = 10;
+	self.coinChance = 0.3;
+	self.powerupChance = 0.1;
+	self.takeDamage = function (damage) {
+		self.health -= damage;
+		LK.effects.flashObject(self, 0xFFFFFF, 200);
+		if (self.health <= 0) {
+			self.shouldDestroy = true;
+			LK.getSound('hit').play();
+		}
+	};
+	self.update = function () {
+		if (bart) {
+			var dx = bart.x - self.x;
+			var dy = bart.y - self.y;
+			var dist = Math.sqrt(dx * dx + dy * dy);
+			if (dist > 0) {
+				self.x += dx / dist * self.speed;
+				self.y += dy / dist * self.speed;
+			}
+		}
+	};
+	return self;
+});
+var PowerUp = Container.expand(function () {
+	var self = Container.call(this);
+	var powerupGraphics = self.attachAsset('powerup', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.type = Math.random() < 0.5 ? 'damage' : 'firerate';
+	self.lifetime = 300;
+	self.update = function () {
+		self.lifetime--;
+		if (self.lifetime <= 0) {
+			self.shouldDestroy = true;
+		}
+		self.rotation += 0.03;
+		self.y += Math.sin(LK.ticks * 0.05) * 0.5;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x000080
+});
+
+/**** 
+* Game Code
+****/ 
+var bart;
+var enemies = [];
+var bullets = [];
+var items = [];
+var wave = 1;
+var enemiesKilled = 0;
+var spawnTimer = 0;
+var dragTarget = null;
+var levelText = new Text2('Level 1', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+levelText.anchor.set(0, 0);
+levelText.x = 150;
+LK.gui.topLeft.addChild(levelText);
+var xpBarBg = LK.gui.top.attachAsset('xpbar_bg', {
+	anchorX: 0.5,
+	anchorY: 0,
+	y: 10
+});
+var xpBarFill = LK.gui.top.attachAsset('xpbar_fill', {
+	anchorX: 0,
+	anchorY: 0,
+	x: -150,
+	y: 10,
+	scaleX: 0
+});
+var coinText = new Text2('Coins: 0', {
+	size: 50,
+	fill: 0xFFD700
+});
+coinText.anchor.set(1, 0);
+LK.gui.topRight.addChild(coinText);
+var waveText = new Text2('Wave 1', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+waveText.anchor.set(0.5, 0.5);
+LK.gui.center.addChild(waveText);
+var scoreText = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0.5, 1);
+LK.gui.bottom.addChild(scoreText);
+bart = game.addChild(new Bart());
+bart.x = 1024;
+bart.y = 2000;
+function spawnEnemy() {
+	var enemy;
+	if (wave % 5 === 0) {
+		enemy = new Boss();
+	} else {
+		enemy = new Mutant();
+		enemy.speed = 2 + wave * 0.2;
+		enemy.maxHealth = 30 + wave * 10;
+		enemy.health = enemy.maxHealth;
+	}
+	enemy.x = Math.random() * 1848 + 100;
+	enemy.y = -100;
+	enemies.push(enemy);
+	game.addChild(enemy);
+}
+function shootBullet() {
+	if (bart.fireTimer > 0 || enemies.length === 0) return;
+	var closestEnemy = null;
+	var closestDist = Infinity;
+	for (var i = 0; i < enemies.length; i++) {
+		var dx = enemies[i].x - bart.x;
+		var dy = enemies[i].y - bart.y;
+		var dist = Math.sqrt(dx * dx + dy * dy);
+		if (dist < closestDist) {
+			closestDist = dist;
+			closestEnemy = enemies[i];
+		}
+	}
+	if (closestEnemy && closestDist < 800) {
+		var bullet = new Bullet();
+		bullet.x = bart.x;
+		bullet.y = bart.y;
+		bullet.target = closestEnemy;
+		bullet.damage = bart.damage;
+		bullets.push(bullet);
+		game.addChild(bullet);
+		bart.fireTimer = bart.fireRate;
+		LK.getSound('shoot').play();
+	}
+}
+function spawnItem(x, y, type) {
+	var item;
+	if (type === 'coin') {
+		item = new Coin();
+	} else {
+		item = new PowerUp();
+	}
+	item.x = x;
+	item.y = y;
+	items.push(item);
+	game.addChild(item);
+}
+game.down = function (x, y, obj) {
+	dragTarget = bart;
+};
+game.up = function (x, y, obj) {
+	dragTarget = null;
+};
+game.move = function (x, y, obj) {
+	if (dragTarget) {
+		dragTarget.x = Math.max(60, Math.min(1988, x));
+		dragTarget.y = Math.max(80, Math.min(2652, y));
+	}
+};
+game.update = function () {
+	shootBullet();
+	spawnTimer--;
+	if (spawnTimer <= 0) {
+		spawnEnemy();
+		spawnTimer = Math.max(30, 120 - wave * 5);
+	}
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		var bullet = bullets[i];
+		if (bullet.shouldDestroy || bullet.y < -50 || bullet.y > 2782) {
+			bullet.destroy();
+			bullets.splice(i, 1);
+			continue;
+		}
+		for (var j = enemies.length - 1; j >= 0; j--) {
+			if (bullet.intersects(enemies[j])) {
+				enemies[j].takeDamage(bullet.damage);
+				bullet.destroy();
+				bullets.splice(i, 1);
+				break;
+			}
+		}
+	}
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var enemy = enemies[i];
+		if (enemy.shouldDestroy) {
+			bart.gainXP(enemy.xpValue);
+			LK.setScore(LK.getScore() + enemy.xpValue);
+			scoreText.setText('Score: ' + LK.getScore());
+			enemiesKilled++;
+			if (Math.random() < enemy.coinChance) {
+				spawnItem(enemy.x, enemy.y, 'coin');
+			}
+			if (Math.random() < enemy.powerupChance) {
+				spawnItem(enemy.x, enemy.y, 'powerup');
+			}
+			enemy.destroy();
+			enemies.splice(i, 1);
+			if (enemiesKilled >= wave * 10) {
+				wave++;
+				enemiesKilled = 0;
+				waveText.setText('Wave ' + wave);
+				tween(waveText, {
+					scaleX: 2,
+					scaleY: 2
+				}, {
+					duration: 500,
+					easing: tween.elasticOut
+				});
+				tween(waveText, {
+					scaleX: 1,
+					scaleY: 1
+				}, {
+					duration: 500,
+					easing: tween.elasticIn
+				});
+			}
+			continue;
+		}
+		if (enemy.intersects(bart)) {
+			bart.takeDamage(10);
+			enemy.shouldDestroy = true;
+		}
+		if (enemy.y > 2832) {
+			enemy.destroy();
+			enemies.splice(i, 1);
+		}
+	}
+	for (var i = items.length - 1; i >= 0; i--) {
+		var item = items[i];
+		if (item.shouldDestroy) {
+			item.destroy();
+			items.splice(i, 1);
+			continue;
+		}
+		if (item.intersects(bart)) {
+			if (item instanceof Coin) {
+				bart.coins += item.value;
+				coinText.setText('Coins: ' + bart.coins);
+			} else if (item instanceof PowerUp) {
+				if (item.type === 'damage') {
+					bart.damage += 5;
+				} else {
+					bart.fireRate = Math.max(5, bart.fireRate - 5);
+				}
+			}
+			LK.getSound('pickup').play();
+			item.destroy();
+			items.splice(i, 1);
+		}
+	}
+	levelText.setText('Level ' + bart.level);
+	xpBarFill.scaleX = bart.xp / bart.xpToNext;
+};
+LK.playMusic('battle');
\ No newline at end of file