WOWOWOWOW!!!!
This is the most kickass animation in the world. The fighting is so graceful. It's artful and fun. It's fairly easy, but not so easy that I wasn't close to death at least once. Congrats, and thanks! This was a real home run.
2 pieces of constructive criticism. First, I wish it were longer. Second, the boss should be a little harder. As long as you stay on him, he never gets a hit in.