Puzzle design is fine, but sometimes the mechanics need a bit more tutorial, despite Jonathan Blow's famous hatred towards idea of tutorial. The control of the platforming is not good and is often the source of frustration. Story tries too hard to impress, but doesn't have enough substance to land the big reveal in the end. Art and sound are monotonous for a four hour experience. so the game is better played piecemeal. I can see its historical significance, but the indie scene has grown so much, we can safely put this one on the shelf.