You should really get into lighting bro, there always so dark. It's still a very nice image, but if you knew how to light up a scene, you could a much better effect out of it. Good job on the image though.
Cool colors, interesting cell render, looks nice. But the left side behind the render is a little boring, considering its an exact duplicate of the render. I like what you did on the right side of the render. Lots of banding, but thats probably just a .jpg issue. Overall it looks good man.