It's nice!
I liked the style very much! These black and white movies...
Well, maybe it could have faster frames per second, but the flash looks pretty good as it is. Could be smoother, but...
Some tweenings were pretty weak, like the demon's one, it looked too static. You could have done a better work there.
The music is cool, but the quality is pretty average. I liked it because it fitted with the flash, anyway :P
Nice job! :D