Just the voices...
Hey, I liked the animation and I think you've got an indiidual style, so I wouldnt give you any crappy recommendations on that part. The only thing you need to do a better job at next time's the voices! I've heard this in many many cartoons, films or anything that was dubbed over by people who don't work as professional voice-actors - just don't hold back! Noone can hear you, it won't be emberassing when the soundfile doesnt sound right the first time, DON'T try to sound cool when you record it :P Just get into the role, and scream, overpronounce, make gestures while talking or whatever would suite the character :) Jus't dont be scared of really getting into it when you record. Also I'd give you the advice to do a better sound mixing next time, as in, pull the music volume down a little bit when its necessary so it doesnt fuck with the speech.