I'm not going to nitpick the animation to death. I saw a few things in there that irked me, but they were minor and not noticeable for most people. I'm especially not going to fault the animation when there's perfectly TERRIBLE music to rip into. Hearing that song on repeat for 7 minutes is like a new, improved version of the Chinese Water Torture. I can't even see how it fits the theme of the movie; yeah, the song is called "hide and seek", but the atmosphere is all wrong for a song like that. A single assassin, infiltrating and fighting her way through a city full of guards, in order to assassinate a wizard-looking woman of extreme power...that doesn't exactly say "fast-paced, bouncy music" to me.
Still, I've seen much worse [http://www.youtube.com/watch?v=FiARsQSlzDc]