needs some improvement

make everything smoother. and faster :p
the rest was okay,
and i think you should cut the looping out

Oh, that guy was meant to be /punching/

I saw it, but I didn't feel it.

Bodies flinching as they are getting shot, people 'bouncing' as they land, sounds as people are being punched - These are small things, but they are the things that separate just a Flash File from an immersive Animation.

Got an error with your music

at the last frame you might want to type in
stopAllSounds();

or just make the song shorter