This is a so-so game.
if you were to add random sounds, and maybe some non-annoying music then the sound would get a 10. style gets a 6 because there are shit loads of shooters out there and this ones not by any means unique. for graphics, atleast add some varied enemies and color the environments differently. For interactivity, you should add some weapons and power ups that you can shoot to pick up, and for humor, atleast make something funny in it....see ya jon.
-Ben