===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,185 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Enemy class
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyAsset = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.radius = enemyAsset.width / 2;
+	self.speedY = 14 + Math.random() * 10; // Random fall speed
+	// Set initial position
+	self.x = 150 + Math.random() * (2048 - 300);
+	self.y = -enemyAsset.height / 2;
+	self.update = function () {
+		self.y += self.speedY;
+	};
+	return self;
+});
+// Player class
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerAsset = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.radius = playerAsset.width / 2;
+	self.groundY = 2400; // Y position of the ground (bottom margin)
+	self.jumpVelocity = -60; // Initial jump velocity (negative is up)
+	self.gravity = 4.2; // Gravity per frame
+	self.velocityY = 0;
+	self.isOnGround = true;
+	// Set initial position
+	self.x = 2048 / 2;
+	self.y = self.groundY;
+	// Call every frame
+	self.update = function () {
+		// Apply gravity if not on ground
+		if (!self.isOnGround) {
+			self.velocityY += self.gravity;
+			self.y += self.velocityY;
+			// Check for landing
+			if (self.y >= self.groundY) {
+				self.y = self.groundY;
+				self.velocityY = 0;
+				self.isOnGround = true;
+			}
+		}
+	};
+	// Jump method
+	self.jump = function () {
+		if (self.isOnGround) {
+			self.velocityY = self.jumpVelocity;
+			self.isOnGround = false;
+		}
+	};
+	return self;
+});
+// Star class
+var Star = Container.expand(function () {
+	var self = Container.call(this);
+	var starAsset = self.attachAsset('star', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.radius = starAsset.width / 2;
+	self.speedY = 12 + Math.random() * 8; // Random fall speed
+	// Set initial position
+	self.x = 150 + Math.random() * (2048 - 300);
+	self.y = -starAsset.height / 2;
+	self.update = function () {
+		self.y += self.speedY;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x0a0a1a
+});
+
+/**** 
+* Game Code
+****/ 
+// Enemy: red box
+// Star: smaller white ellipse
+// Player character: yellow ellipse (star jumper)
+// Score display (top left, avoid 100x100 area)
+var scoreTxt = new Text2('0', {
+	size: 110,
+	fill: 0xFFF700
+});
+scoreTxt.anchor.set(0, 0); // Top left
+scoreTxt.x = 120; // Leave margin for menu
+scoreTxt.y = 40;
+LK.gui.top.addChild(scoreTxt);
+// Player instance
+var player = new Player();
+game.addChild(player);
+// Arrays for stars and enemies
+var stars = [];
+var enemies = [];
+// Timers for spawning
+var starSpawnTimer = 0;
+var enemySpawnTimer = 0;
+// Helper: spawn a star
+function spawnStar() {
+	var star = new Star();
+	stars.push(star);
+	game.addChild(star);
+}
+// Helper: spawn an enemy
+function spawnEnemy() {
+	var enemy = new Enemy();
+	enemies.push(enemy);
+	game.addChild(enemy);
+}
+// Touch/tap to jump
+game.down = function (x, y, obj) {
+	player.jump();
+};
+// Main update loop
+game.update = function () {
+	// Update player
+	player.update();
+	// Spawn stars
+	starSpawnTimer--;
+	if (starSpawnTimer <= 0) {
+		spawnStar();
+		starSpawnTimer = 36 + Math.floor(Math.random() * 24); // 0.6-1.0s at 60fps
+	}
+	// Spawn enemies
+	enemySpawnTimer--;
+	if (enemySpawnTimer <= 0) {
+		spawnEnemy();
+		enemySpawnTimer = 60 + Math.floor(Math.random() * 40); // 1.0-1.7s at 60fps
+	}
+	// Update and check stars
+	for (var i = stars.length - 1; i >= 0; i--) {
+		var star = stars[i];
+		star.update();
+		// Off screen
+		if (star.y - star.radius > 2732) {
+			star.destroy();
+			stars.splice(i, 1);
+			continue;
+		}
+		// Collision with player
+		if (player.intersects(star)) {
+			LK.setScore(LK.getScore() + 1);
+			scoreTxt.setText(LK.getScore());
+			star.destroy();
+			stars.splice(i, 1);
+			continue;
+		}
+	}
+	// Update and check enemies
+	for (var j = enemies.length - 1; j >= 0; j--) {
+		var enemy = enemies[j];
+		enemy.update();
+		// Off screen
+		if (enemy.y - enemy.radius > 2732) {
+			enemy.destroy();
+			enemies.splice(j, 1);
+			continue;
+		}
+		// Collision with player
+		if (player.intersects(enemy)) {
+			LK.effects.flashScreen(0xff0000, 800);
+			LK.showGameOver();
+			return;
+		}
+	}
+};
+// Set initial score
+LK.setScore(0);
+scoreTxt.setText('0');
\ No newline at end of file