Not bad, since you're a good artist I'll get into some specifics I suppose. Your glow from your crystal/diamond things aren't too good. It's a pretty obvious hard brush scaled properly then lowered opacity on a layer above the drawing. (At least, that's what it looks like) If you want a nice looking glow, I'd suggest making multiple layers, one layer having a larger brushed area than the last, and as you keep getting larger with your brushes, lower the opacity more and more. This way the glow sort of dims out throughout the picture rather than abruptly stopping like you're doing. It's a pain but it has a nice result so it's worth it in my opinion. I'd say make your shading/highlighting a bit more intense, but I'm not sure how it would look because you have a very unusual style. Perhaps play around with it after you finish colouring it as a whole, or if you give me permission I could play around with it a bit.
