A remarkably intricate and very well made puzzler, the only real flaw I could see was, given how easy it was to make a puzzle unbeatable, the lack of a quickload button. But that's really just a minor niggle.
This game starts out so smug and irritating I want to hold down whoever wrote it an slap the pretensions out of them. It does grow on me, though, and by the last quarter I figured I could buy it.