Oh, I understand you because it is very difficult see the mechanic . The objective of mechanic is 3D object movement and I convert to 2D game. Objects in the game can move in 2 way are front layer to back layer and back layer to front layer. It will easy to see if we set the camera in "Perspective" view but we use "Orthographic" because it look 2D. I try use lighting to make it clear what layer objects are there but it did not help mush. finally, I really thank you for playing my game. I just woke up lol, I will try other wonderful games include your as well. See ya ;)