Added custom collision

Assets/Scripts/EnemyController.cs

@@ -4,6 +4,12 @@ public class EnemyController : OrbitalPositionBehaviour
 {
     public override void OnStart()
     {
-        m_OrbitalPosition.m_DeletedAtCentre = true;
+        transform.position = new Vector3(0, 0, -200f);
+        m_OrbitalPosition.RadiusDistance = 0.2f;
+    }
+
+    public override void OnReachCentre()
+    {
+        Destroy(gameObject);
     }
 }