Quite nice, few tips though,

Dont pillow shade, Reduces Colours, And dont mirror line art so extreamly. also try to increase contrast between shades of colour.

Whilst eveything Mullet says is true, it looks very nice :)

I sense pillow shading, world hold on, no i think it's very cool, i can't make things like this :(. But how many colours did you use ??

Not bad for an early piece. There are way too many colors and far too little contrast. It's also pillow shaded, which is a sin, heh. Other than that, not too bad. Maybe it would have been easier to keep in check if it was a smaller piece though.