I was thinking of adding colours but I thought that the one colour scheme worked well. That way it works on any tshirt colour aswell.

submit this/

i wish it wasn't quite so much of a box. make it taper into his head.

It's good, but red makes it look a bit harsh and none to easy to read I would suggest good old yellow. I agree with laipla, but don't change it too much, it's shape is not that bad because of it's size