With Cube Pusher you can quickly press and hold your 3D shape and your block will quickly hit the other 3D square and push it before it. In case you press it at the right speed, the 3D square will enter the white area and you will succeed.
the moment the block enters the white area, you will secure additional focuses. In the event that part of your 3D square rests in the white area, the part will slide into the room below and it will be difficult to push it back into the white area.
the moment the shape is completely outside the white area, the game ends.