I love this. I like the gree n on the pale green. Not sure what you have planned for the yellow or the blue but I'de like to see the yellow on a paler yellow shirt and the blue on a lighter shade of blue tee. Good job *Thumbs up* I would buy this.
the tail of the arrow kills the vortex motion that is started around the head. that needs to be fixed. Also, is he dripping liquid cancer from his mouth? Yuck. Spiral hypno-eyes might help bring the image together better.