Alright
Hehe, beating up morons is fun. It definitely needs sound, but it's not a necessity. Sounds can be annoying to find, you often can't find one you like and making sounds is... Well, it's like making sounds. And that's not my idea of fun.
If you can't get sounds in reasonably easily, just don't do it for a while. I don't mind.
P.S: I liked the ending quite a lot, what with the zooming hand and all. The closing circle wasn't really a circle though.