Quite good!
Interesting use of sounds. Tons of variation. I really enjoyed this.
I don't think it needs lyrics, stands quite well on its own as an instrumental piece. Only criticism I have is that the whole song sounds like it's clipping or something. You've got a slight fuzz/distortion over the whole thing, i'm not sure if that was intentional or not (going for a fuzzy grunge sound maybe? I dunno). Anyways, that's the only thing that didn't appeal to me.
Good work!