===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,252 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var EnemyBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('enemyBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 8;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+var EnemyPlane = Container.expand(function () {
+	var self = Container.call(this);
+	var planeGraphics = self.attachAsset('enemyPlane', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	planeGraphics.rotation = Math.PI;
+	self.speed = 2;
+	self.direction = 1;
+	self.lastShot = 0;
+	self.shotInterval = 120; // 2 seconds at 60fps
+	self.health = 1;
+	self.update = function () {
+		// Move down slowly
+		self.y += self.speed;
+		// Side to side movement
+		self.x += self.direction * 1.5;
+		if (self.x <= 100 || self.x >= 1948) {
+			self.direction *= -1;
+		}
+		// Shooting logic
+		self.lastShot++;
+		if (self.lastShot >= self.shotInterval) {
+			self.shoot();
+			self.lastShot = 0;
+		}
+	};
+	self.shoot = function () {
+		if (self.parent) {
+			var bullet = new EnemyBullet();
+			bullet.x = self.x;
+			bullet.y = self.y + 40;
+			bullet.lastY = bullet.y;
+			enemyBullets.push(bullet);
+			game.addChild(bullet);
+			LK.getSound('enemyShoot').play();
+		}
+	};
+	return self;
+});
+var PlayerBullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('playerBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -12;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+var PlayerPlane = Container.expand(function () {
+	var self = Container.call(this);
+	var planeGraphics = self.attachAsset('playerPlane', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.health = 3;
+	self.lastShot = 0;
+	self.shotCooldown = 10; // shots per second limit
+	self.shoot = function () {
+		if (self.lastShot <= 0) {
+			var bullet = new PlayerBullet();
+			bullet.x = self.x;
+			bullet.y = self.y - 50;
+			bullet.lastY = bullet.y;
+			playerBullets.push(bullet);
+			game.addChild(bullet);
+			LK.getSound('shoot').play();
+			self.lastShot = self.shotCooldown;
+		}
+	};
+	self.update = function () {
+		if (self.lastShot > 0) {
+			self.lastShot--;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var playerPlane;
+var enemyPlanes = [];
+var playerBullets = [];
+var enemyBullets = [];
+var enemySpawnTimer = 0;
+var enemySpawnInterval = 180; // 3 seconds at 60fps
+var difficultyTimer = 0;
+var dragNode = null;
+// Create score display
+var scoreTxt = new Text2('Score: 0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Create player plane
+playerPlane = game.addChild(new PlayerPlane());
+playerPlane.x = 1024;
+playerPlane.y = 2400;
+// Game event handlers
+function handleMove(x, y, obj) {
+	if (dragNode) {
+		// Keep player plane within screen bounds
+		dragNode.x = Math.max(60, Math.min(1988, x));
+		dragNode.y = Math.max(40, Math.min(2692, y));
+	}
+}
+game.move = handleMove;
+game.down = function (x, y, obj) {
+	// Start dragging player plane
+	dragNode = playerPlane;
+	handleMove(x, y, obj);
+	// Shoot bullet
+	playerPlane.shoot();
+};
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// Main game update loop
+game.update = function () {
+	// Update timers
+	enemySpawnTimer++;
+	difficultyTimer++;
+	// Increase difficulty over time
+	if (difficultyTimer % 1800 == 0) {
+		// Every 30 seconds
+		enemySpawnInterval = Math.max(60, enemySpawnInterval - 20);
+	}
+	// Spawn enemy planes
+	if (enemySpawnTimer >= enemySpawnInterval) {
+		var enemy = new EnemyPlane();
+		enemy.x = Math.random() * 1800 + 124;
+		enemy.y = -100;
+		enemy.lastY = enemy.y;
+		enemy.lastIntersecting = false;
+		enemyPlanes.push(enemy);
+		game.addChild(enemy);
+		enemySpawnTimer = 0;
+	}
+	// Update player bullets
+	for (var i = playerBullets.length - 1; i >= 0; i--) {
+		var bullet = playerBullets[i];
+		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
+		// Remove bullets that go off screen
+		if (bullet.lastY >= -50 && bullet.y < -50) {
+			bullet.destroy();
+			playerBullets.splice(i, 1);
+			continue;
+		}
+		// Check collision with enemy planes
+		var hitEnemy = false;
+		for (var j = enemyPlanes.length - 1; j >= 0; j--) {
+			var enemy = enemyPlanes[j];
+			if (bullet.intersects(enemy)) {
+				// Hit enemy
+				LK.setScore(LK.getScore() + 10);
+				scoreTxt.setText('Score: ' + LK.getScore());
+				// Destroy enemy
+				LK.effects.flashObject(enemy, 0xff0000, 300);
+				LK.getSound('explosion').play();
+				enemy.destroy();
+				enemyPlanes.splice(j, 1);
+				// Destroy bullet
+				bullet.destroy();
+				playerBullets.splice(i, 1);
+				hitEnemy = true;
+				break;
+			}
+		}
+		if (!hitEnemy) {
+			bullet.lastY = bullet.y;
+		}
+	}
+	// Update enemy bullets
+	for (var i = enemyBullets.length - 1; i >= 0; i--) {
+		var bullet = enemyBullets[i];
+		if (bullet.lastY === undefined) bullet.lastY = bullet.y;
+		// Remove bullets that go off screen
+		if (bullet.lastY <= 2782 && bullet.y > 2782) {
+			bullet.destroy();
+			enemyBullets.splice(i, 1);
+			continue;
+		}
+		// Check collision with player
+		if (bullet.intersects(playerPlane)) {
+			// Player hit
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.getSound('explosion').play();
+			LK.showGameOver();
+			return;
+		}
+		bullet.lastY = bullet.y;
+	}
+	// Update enemy planes
+	for (var i = enemyPlanes.length - 1; i >= 0; i--) {
+		var enemy = enemyPlanes[i];
+		if (enemy.lastY === undefined) enemy.lastY = enemy.y;
+		// Remove enemies that go off screen
+		if (enemy.lastY <= 2782 && enemy.y > 2782) {
+			enemy.destroy();
+			enemyPlanes.splice(i, 1);
+			continue;
+		}
+		// Check collision with player
+		if (enemy.intersects(playerPlane)) {
+			// Player hit by enemy plane
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.getSound('explosion').play();
+			LK.showGameOver();
+			return;
+		}
+		enemy.lastY = enemy.y;
+	}
+	// Victory condition - survive for high score
+	if (LK.getScore() >= 500) {
+		LK.showYouWin();
+	}
+};
+// Start background music
+LK.playMusic('bgmusic');
\ No newline at end of file