Game of skill with ball following track - has tunnel that is bent on itself in opaque body

摘要

The game of skill uses a ball that follows a track in an opaque cube. The track is a tunnel that is bent on itself many times and has no dead ends. It has only one exit and one entry. The ball is moved along the track by changing the position of the body. The position of the ball must be felt and the previous position has to be remembered so that the ball does not go backwards.