(Huh, Newgrounds ate my review. Let's try that again.)
Never thought I'd give a game with illusory walls a score this high. Here they're clearly telegraphed, so they're cute rather than infuriating.
Level design is solid, controls are clean and responsive, and even the storytelling and atmosphere are nicely executed. Really, the only thing I'd mention is that the music cuts off abruptly at level end, which is very jarring; you've got time to fade it out gently during the congratulatory level outros, so use that.