I made it work, it was being blocked by something I have running.
Thoughts are that hitting the birds is very satisfying, probably because of the good choice of sound effects

Liked the particle effects too, it would be extra extra great to have some feathers see-sawing down the screen after you kill a bird. It doesnt really have anything yet to make you want to play more than a few times though.
Perhaps you could add in some levels and bonuses and hazards of some kind?
