Very pretty, but unfortunately gets the puzzle gears going so slow that it often veers into boredom, none more so when the boss sequences spin up. There is some truly clever puzzle design in there, but the first time I was floored by the application of the core concept, the in-game progress meter told me I was already 90% through the game. All in all, it is a perfectly fine way to spend a couple of hours, but after this game being on so many top 10 lists, I expected much more, and came away disappointed.