Now I can fully see you utilizing the color. What I liked the most about this was probably the green and purple in the background. I really do like how you used Mojo Jojo for being based on this. I was quite the artist myself as a kid and I really enjoyed drawing him. While he wasn't a personal favorite, I just thought he was nicely designed. I can see where you got the inspiration from.

It looks like the black is supposed to be his hair instead of his brain. Of course, hair is what's on top of a brain anyway. I remember when I lived up North and wore hats like that. Not so much now in the South. The mouth looks a lot like his too.