Superbrothers: Sword & Sworcery EP. Just finished playing this the other day. The game relies on your hardware's internal clock so I had to wait 6 to finish it without cheating. The game is really fun and the art is amazing, the best looking pixel art in a game that I've seen. Sucks that it's short, I guess most EPs are though..
I put my rough sketch for this piece after the jump.