A really cool idea. The only problem was that it got old defending the body after a while. Also I found you could just cheese it by getting in a certain spot and swinging the mouse around in circles.
It would have been really cool if you (the arm) had to go on a quest to deliver an important scroll to the king, but the monsters are trying to stop you. Your body had failed, but the quest is too important to give up.
In other things, the art was really good.