Real Cyan brilliance hobbled by what must have been some troubled production. Commits a few sins that keep it shy of greatness. Some areas appear to have been intended as puzzles but left unfinished, and kept as set dressing, leaving the player to poke around endlessly with no way of knowing whether you're supposed to be finding something or not. Still a great game with a fantastic central conceit that gives you a portal-like experience once it's revealed. Worth your time but it could have been great and it's just good.