This game begins when we find this piece at the green spot that looks like a unicycle. The movement of the piece was already the game and just adding a piece of semicircle on the top to put a ball and the movement is achieved. It spent a month and a half at the workshop. The set of pulleys was very difficult to find. All were intuitions but the ultimate goal was well defined and the game was out.
It is a game that is very itchy for adults. You dare?
Important: The patience and concentration are essential!