Too short, unoriginal idea, but nice blood effect.
A short movie like this, about 20 seconds long is something I don't like to see. If it would have been longer, maybe 3-5 minutes and had a storyline I think this could have done well. STICK FIGURES! We've seen enough of these and all they show to me is someone's practice with Flash. (You don't go to see a sports team at practice, but you go to see their games.) Perhaps you should have spent more time on this. On the other hand I liked the blood effect at the end. Also the animation was smooth which is really good. Just build up your flaws and make some new, original ideas. I'll be watching for more by you in the future.