Okay, this is actually insanely clever. The fact that it accounts for people building impossible to beat levels and forces the builder to make to make something TOUGH but BEATABLE, makes this immediately worthwhile. Its basically like a overly simplified version of Super Mario Maker, just without any like... abilities. Its simply... jump, build, repeat. Very strong design for a game, this is something I would certainly pay for, if there was even more blocks to mess with and build with. I can see something like this becoming popular.