Clone of some popular game that I forgot the name of where you're a block and you move around a maze (tile-based, 2d) but you can't take small steps or slow down, you always slide quickly in one direction until you hit a wall. It's a puzzle game, you gotta make it to the exit without hitting the kill blocks. He wants to figure out how to make an in-game level editor for it but he still only 10% groks the node/scene system so that'll take him some attempts for sure :D