Cowbell. erm, I mean pieces.
It could use more pieces as well as more categories.
Maybe a nose and ear category. Maybe like film grain and sepia layers in a layer/tint category.
Pieces like gunshots would look badass also.
I see how you have said you have limited time to work on it, but no offense, you should have worked on it longer before you submitted it. That would have given it a better score, and the popularity this could gather.
Good luck on this project, it has great potential.