Loved the idea! Loved the puzzles! The Zed movement drove me INSANE! The fact that you could drift off-screen and not know how to get back was irritating at times and the slow responsiveness of the direction changes as well. I think a bit snappier on the directional changes with a arrow bubble indicating where you were off-screen (or not being able to go off-screen at all) would have put this game over the top! Nice job on it!