I don't know who created that but it is genius and took a lot of work and gave me an idea for a sandbox game where the player must design a perpetual motion machine using various parts provided to get a ball with physics and gravity to complete a circuit ending back where it started in a continual loop.
It would be a neat game and good way to introduce kids and adults to physics.
I have too many projects in the works now so I thought I would throw this up there to inspire some other creative people.