Xbox Live Arcade release I've been waiting a while for, and it came out earlier this week.
Got a few interesting features, including an interesting narration technique which communicates a great deal of backstory and guides the player quite well. Also, paths are built out in front of the character, as it goes in a certain direction. Makes for an interesting look -- plus the art is beautifully hand-dawn.
Only played a few hours so far, but I'm really liking it. I'd recommend at least a demo download, if you are so inclined.