Decent game
Good graphics, especially the clouds and the moving background. The bad guys could stand to have some animating done to them. So could the bird. Flapping wings, different expressions, etc. Also, don't have the bird exactly follow the mouse... add a bit of lag into it which would make it a bit more fluid. You could have different requirements for each level... number of flies to eat, guys to take out, etc. Also, you could have powerups... speed, invulnerability, different projectiles... stuff like that. That constant growling sound or whatever it is needs to go though. I'm not sure if it was the bird or the bad guys making that sound, but it got pretty annoying. You could fly right under the guys with guns, so you might want to fix that also. Overall, pretty cool game.