added bonus and side moving obstacle

Assets/Code/Gameplay/Level/SideMovingObstacle.cs

@@ -0,0 +1,39 @@
+using UnityEngine;
+
+namespace Code.Gameplay.Level
+{
+    public class SideMovingObstacle : MonoBehaviour
+    {
+        public float speed = 10f;
+        [SerializeField] private float range = 7f;
+        private bool _movingRight;
+
+        private void Start()
+        {
+            _movingRight = transform.position.x < 0;
+            UpdateRotation();
+        }
+
+        private void Update()
+        {
+            var step = speed * Time.deltaTime;
+            transform.Translate(Vector3.forward * step);
+
+            if (_movingRight && transform.position.x >= range)
+            {
+                _movingRight = false;
+                UpdateRotation();
+            }
+            else if (!_movingRight && transform.position.x <= -range)
+            {
+                _movingRight = true;
+                UpdateRotation();
+            }
+        }
+
+        private void UpdateRotation()
+        {
+            transform.rotation = Quaternion.Euler(0, _movingRight ? 90 : -90, 0);
+        }
+    }
+}