Played it all weekend, just beat 7-4... this game is just so clever - the change in settings, unique gameplay styles, puzzles (some of them are pretty challenging)... The game itself (i.e. monster encounters) has gotten a bit more challenging since the beginning, I've only died once so far. The game really has kept me hooked. Gonna probably have it done by next weekend. The whole of 3-4, world 4-4, world 6, the end of 7-2... had me saying HOLY SHIT! This is by far my favorite game of the so called next gen.