That's a really amazing picture. I love nearly everything !
I love the way you drew that girl. Her face is so beautiful. Especially her eyes look very cool and real (I'm a huge fan of unrealistic eye colours) . The dress is so amazing.. I can't find the right word to describe it .
But there are some things I don't like so much (but they look great anyway): I think her pose looks a bit stiff and the water surface seems to be unfinished (the rest of the background looks so awesome, so the surface looks a bit strange).
I really want your drawing skills ^_^ It was my first critique btw... (Sorry for my english ...)