Not much to say; a lot and all has been said by the designer and owner here. Basically a film cutter from 120 to 127 film format. The thing has been tried, the idea is not new: take a faulty camera and put blades inside, fixed to a block of some sort, and close the back; roll the film as you would with a real advancing motion, and there you go.

However, this time we are talking about is something different. Check it out.