Pretty neat, but the change takes a little long, try and shorten that down a bit. Also, what's with your pinky poking out like that? It's a little distracting.
It looks okay, i think it needs so work. It just looks a little suspicious to me. Check this out for some pen magic inspiration http://www.youtube.com/watch?v=e8F95i4eGbc Michael Feldman's End for End from DanandDave