Pretty Good.
Nice work.
One thing that I could suggest is that you might consider some reaction by the vampires when the get killed. There's something about them just standing there while she kills them that doesn't seem right.
The only other thing you could do would be to put just a little bit more emotion into the characters. I realize that this is just a flash movie, but just that little thing could put this movie above top notch.
Otherwise, Great Job and keep up the good work!