===================================================================
--- original.js
+++ change.js
@@ -10,8 +10,9 @@
 	});
 	self.speed = 3;
 	self.update = function () {
 		self.x += self.speed + LK.ticks / 500; // Increase speed over time
+		self.y += Math.sin(LK.ticks / 100) * 2; // Add vertical oscillation
 		// Reset enemy position if it moves out of bounds
 		if (self.x > 2048) {
 			self.x = -self.width;
 			self.y += (Math.random() - 0.5) * 20; // Add random vertical movement
@@ -30,8 +31,16 @@
 	var obstacleGraphics = self.attachAsset('obstacle', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
+	self.speed = 2;
+	self.update = function () {
+		self.x -= self.speed;
+		if (self.x < -self.width) {
+			self.x = 2048 + Math.random() * 2048;
+			self.y = Math.random() * 2732;
+		}
+	};
 });
 // Player class
 var Player = Container.expand(function () {
 	var self = Container.call(this);
@@ -113,8 +122,11 @@
 		if (player.intersects(enemy)) {
 			LK.showGameOver();
 		}
 	});
+	obstacles.forEach(function (obstacle) {
+		obstacle.update();
+	});
 	if (LK.ticks % 120 === 0 && enemies.length < 15) {
 		var newEnemy = game.addChild(new Enemy());
 		newEnemy.x = -newEnemy.width;
 		newEnemy.y = Math.random() * 2732;