Nice little game! I really like the world a lot.
I agree with @chefal that more feedback would be nice, especial when the snakes get hit. They do have a little animation, but adding a flash and a sound effect would be great. Shooting, slicing and taking damage would also be improved with a little more feedback.
BTW, since there is no Linux build, I actually played it through WINE, which played fine, but the music sounded a little demonic. :-)