A beautiful game.
A nice combination of platform games like Pitfall II, Prince of Persia and Another World with a gorgeous look to it.
The puzzles aren't going to drive you crazy but some of them made me think and it felt nice to figure them out.
A nice feature is the way the game saves. It saves after each unique puzzle and you'll never find yourself replaying a large part of the game just to get to one part when you screwed up.
The thing that I like most about the game is the simplicity - so much is conveyed with two colours and two buttons. Many modern game developers should take note - you don't need a lot of flash, simple good gameplay still goes a long way.
What surprised me the most though, was the level of violence. While I didn't mind it, it may not be the best game for kiddies. Dragging a floating body from the water to use it is probably not something you want your eight year old doing in a game.
The game won't take long to finish if you like platformers and puzzles. I know some people will complain about the price but its no different than seeing two full price movies and the game has such a feel to it that you'll probably remember it long after you've finished it.
Try the demo, it's free - if you like it, buy it. It's not complicated.
For me, it was one of the few exclusive games the 360 had and its now one less reason to even think about getting a 350 in the future.