===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,404 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Enemy
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyGfx = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.radius = enemyGfx.width * 0.5;
+	self.speed = 8 + Math.random() * 8;
+	self.moveType = Math.random() < 0.5 ? 'straight' : 'sine';
+	self.sinePhase = Math.random() * Math.PI * 2;
+	self.sineAmp = 120 + Math.random() * 120;
+	self.shootCooldown = 60 + Math.floor(Math.random() * 60);
+	self.update = function () {
+		if (self.moveType === 'straight') {
+			self.y += self.speed;
+		} else {
+			self.y += self.speed * 0.85;
+			self.x += Math.sin(self.y / 120 + self.sinePhase) * 6;
+		}
+		self.shootCooldown--;
+	};
+	return self;
+});
+// Enemy Bullet
+var EnemyBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGfx = self.attachAsset('enemyBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 20;
+	self.dirX = 0;
+	self.dirY = 1;
+	self.update = function () {
+		self.x += self.dirX * self.speed;
+		self.y += self.dirY * self.speed;
+	};
+	return self;
+});
+// Player Bullet
+var PlayerBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGfx = self.attachAsset('playerBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -32;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Powerup
+var Powerup = Container.expand(function () {
+	var self = Container.call(this);
+	var powerupGfx = self.attachAsset('powerup', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.type = Math.random() < 0.5 ? 'rapid' : 'shield';
+	powerupGfx.tint = self.type === 'rapid' ? 0xffe100 : 0x00ffff;
+	self.speed = 10;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Player Ship
+var Ship = Container.expand(function () {
+	var self = Container.call(this);
+	var shipGfx = self.attachAsset('ship', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.radius = shipGfx.width * 0.5;
+	self.shootCooldown = 0;
+	self.rapidFire = false;
+	self.rapidFireTimer = 0;
+	self.shield = false;
+	self.shieldTimer = 0;
+	// Visual shield indicator
+	var shieldGfx = self.attachAsset('ship', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 1.3,
+		scaleY: 1.3,
+		tint: 0x00ffff
+	});
+	shieldGfx.alpha = 0.25;
+	shieldGfx.visible = false;
+	self.update = function () {
+		// Handle powerup timers
+		if (self.rapidFire) {
+			self.rapidFireTimer--;
+			if (self.rapidFireTimer <= 0) {
+				self.rapidFire = false;
+			}
+		}
+		if (self.shield) {
+			self.shieldTimer--;
+			if (self.shieldTimer <= 0) {
+				self.shield = false;
+				shieldGfx.visible = false;
+			}
+		}
+	};
+	self.activateRapidFire = function (duration) {
+		self.rapidFire = true;
+		self.rapidFireTimer = duration;
+	};
+	self.activateShield = function (duration) {
+		self.shield = true;
+		self.shieldTimer = duration;
+		shieldGfx.visible = true;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x000010
+});
+
+/**** 
+* Game Code
+****/ 
+// Music
+// Sound effects
+// Powerup
+// Enemy bullet
+// Enemy
+// Player bullet
+// Spaceship (player)
+// Game area
+var GAME_W = 2048,
+	GAME_H = 2732;
+// Score
+var score = 0;
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Player ship
+var ship = new Ship();
+game.addChild(ship);
+ship.x = GAME_W / 2;
+ship.y = GAME_H - 350;
+// Arrays for game objects
+var playerBullets = [];
+var enemies = [];
+var enemyBullets = [];
+var powerups = [];
+// Dragging
+var dragNode = null;
+// Difficulty
+var enemySpawnTimer = 0;
+var enemySpawnInterval = 60;
+var minEnemyInterval = 18;
+var enemySpeedInc = 0;
+// Powerup spawn
+var powerupTimer = 0;
+var powerupInterval = 600;
+// Last intersect states
+var lastShipEnemyIntersect = false;
+var lastShipEnemyBulletIntersect = false;
+var lastShipPowerupIntersect = false;
+// Music
+LK.playMusic('bgmusic');
+// Move handler (drag ship)
+function handleMove(x, y, obj) {
+	if (dragNode === ship) {
+		// Clamp ship inside game area (with margin)
+		var margin = 80;
+		var nx = Math.max(margin, Math.min(GAME_W - margin, x));
+		var ny = Math.max(margin, Math.min(GAME_H - margin, y));
+		ship.x = nx;
+		ship.y = ny;
+	}
+}
+game.move = handleMove;
+game.down = function (x, y, obj) {
+	// Only drag if touch is on ship
+	var dx = x - ship.x,
+		dy = y - ship.y;
+	if (dx * dx + dy * dy < ship.radius * ship.radius * 1.2) {
+		dragNode = ship;
+		handleMove(x, y, obj);
+	}
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// Main update loop
+game.update = function () {
+	// Update ship
+	ship.update();
+	// --- Player shooting ---
+	ship.shootCooldown--;
+	var shootRate = ship.rapidFire ? 6 : 18;
+	if (ship.shootCooldown <= 0) {
+		// Auto-fire
+		var pb = new PlayerBullet();
+		pb.x = ship.x;
+		pb.y = ship.y - ship.radius - 30;
+		playerBullets.push(pb);
+		game.addChild(pb);
+		ship.shootCooldown = shootRate;
+		LK.getSound('shoot').play();
+	}
+	// --- Update player bullets ---
+	for (var i = playerBullets.length - 1; i >= 0; i--) {
+		var b = playerBullets[i];
+		b.update();
+		// Remove if off screen
+		if (b.y < -80) {
+			b.destroy();
+			playerBullets.splice(i, 1);
+		}
+	}
+	// --- Update enemies ---
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var e = enemies[i];
+		e.update();
+		// Remove if off screen
+		if (e.y > GAME_H + 120) {
+			e.destroy();
+			enemies.splice(i, 1);
+			continue;
+		}
+		// Enemy shooting
+		if (e.shootCooldown <= 0) {
+			var eb = new EnemyBullet();
+			eb.x = e.x;
+			eb.y = e.y + e.radius + 10;
+			// Aim at ship
+			var dx = ship.x - e.x,
+				dy = ship.y - e.y;
+			var len = Math.sqrt(dx * dx + dy * dy);
+			if (len > 0) {
+				eb.dirX = dx / len;
+				eb.dirY = dy / len;
+			}
+			enemyBullets.push(eb);
+			game.addChild(eb);
+			e.shootCooldown = 90 + Math.floor(Math.random() * 60);
+		}
+	}
+	// --- Update enemy bullets ---
+	for (var i = enemyBullets.length - 1; i >= 0; i--) {
+		var eb = enemyBullets[i];
+		eb.update();
+		if (eb.x < -100 || eb.x > GAME_W + 100 || eb.y < -100 || eb.y > GAME_H + 100) {
+			eb.destroy();
+			enemyBullets.splice(i, 1);
+		}
+	}
+	// --- Update powerups ---
+	for (var i = powerups.length - 1; i >= 0; i--) {
+		var p = powerups[i];
+		p.update();
+		if (p.y > GAME_H + 100) {
+			p.destroy();
+			powerups.splice(i, 1);
+		}
+	}
+	// --- Collision: Player bullets vs Enemies ---
+	for (var i = playerBullets.length - 1; i >= 0; i--) {
+		var b = playerBullets[i];
+		for (var j = enemies.length - 1; j >= 0; j--) {
+			var e = enemies[j];
+			if (b.intersects(e)) {
+				// Enemy down
+				LK.getSound('enemyDown').play();
+				score += 10;
+				scoreTxt.setText(score);
+				e.destroy();
+				enemies.splice(j, 1);
+				b.destroy();
+				playerBullets.splice(i, 1);
+				break;
+			}
+		}
+	}
+	// --- Collision: Ship vs Enemies ---
+	var shipEnemyIntersect = false;
+	for (var i = 0; i < enemies.length; i++) {
+		var e = enemies[i];
+		if (ship.intersects(e)) {
+			shipEnemyIntersect = true;
+			break;
+		}
+	}
+	if (!lastShipEnemyIntersect && shipEnemyIntersect) {
+		if (ship.shield) {
+			// Absorb hit, destroy enemy
+			LK.effects.flashObject(ship, 0x00ffff, 400);
+			for (var i = 0; i < enemies.length; i++) {
+				if (ship.intersects(enemies[i])) {
+					enemies[i].destroy();
+					enemies.splice(i, 1);
+					break;
+				}
+			}
+			ship.shield = false;
+			ship.shieldTimer = 0;
+			ship.children[1].visible = false;
+		} else {
+			// Game over
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.getSound('hit').play();
+			LK.showGameOver();
+			return;
+		}
+	}
+	lastShipEnemyIntersect = shipEnemyIntersect;
+	// --- Collision: Ship vs Enemy Bullets ---
+	var shipEnemyBulletIntersect = false;
+	for (var i = 0; i < enemyBullets.length; i++) {
+		var eb = enemyBullets[i];
+		if (ship.intersects(eb)) {
+			shipEnemyBulletIntersect = true;
+			break;
+		}
+	}
+	if (!lastShipEnemyBulletIntersect && shipEnemyBulletIntersect) {
+		if (ship.shield) {
+			LK.effects.flashObject(ship, 0x00ffff, 400);
+			// Remove bullet
+			for (var i = 0; i < enemyBullets.length; i++) {
+				if (ship.intersects(enemyBullets[i])) {
+					enemyBullets[i].destroy();
+					enemyBullets.splice(i, 1);
+					break;
+				}
+			}
+			ship.shield = false;
+			ship.shieldTimer = 0;
+			ship.children[1].visible = false;
+		} else {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.getSound('hit').play();
+			LK.showGameOver();
+			return;
+		}
+	}
+	lastShipEnemyBulletIntersect = shipEnemyBulletIntersect;
+	// --- Collision: Ship vs Powerups ---
+	var shipPowerupIntersect = false;
+	for (var i = powerups.length - 1; i >= 0; i--) {
+		var p = powerups[i];
+		if (ship.intersects(p)) {
+			shipPowerupIntersect = true;
+			// Apply powerup
+			LK.getSound('powerup').play();
+			if (p.type === 'rapid') {
+				ship.activateRapidFire(360);
+			} else if (p.type === 'shield') {
+				ship.activateShield(480);
+			}
+			p.destroy();
+			powerups.splice(i, 1);
+		}
+	}
+	lastShipPowerupIntersect = shipPowerupIntersect;
+	// --- Enemy spawn ---
+	enemySpawnTimer--;
+	if (enemySpawnTimer <= 0) {
+		// Spawn enemy at random x
+		var e = new Enemy();
+		e.x = 180 + Math.random() * (GAME_W - 360);
+		e.y = -100;
+		// Increase speed as score increases
+		e.speed += Math.floor(score / 200) * 2;
+		enemies.push(e);
+		game.addChild(e);
+		// Decrease interval as score increases
+		enemySpawnInterval = Math.max(minEnemyInterval, 60 - Math.floor(score / 100) * 4);
+		enemySpawnTimer = enemySpawnInterval;
+	}
+	// --- Powerup spawn ---
+	powerupTimer--;
+	if (powerupTimer <= 0) {
+		var p = new Powerup();
+		p.x = 180 + Math.random() * (GAME_W - 360);
+		p.y = -80;
+		powerups.push(p);
+		game.addChild(p);
+		powerupInterval = 600 + Math.floor(Math.random() * 600);
+		powerupTimer = powerupInterval;
+	}
+};
\ No newline at end of file