Honestly, it's beautiful. It all looks so real. I love how detailed it is. The only thing that would make it look more realistic is if you dont use ANY lines for your character, but I'd say that that is pretty difficult, so I personally already am jealous of what you have made right now. Maybe the rock can be blend in a little bit more with the background, since it sorta looks (nothing offensive meant) like you've made the character on the stone, the background and then just put the two of them together. But even though, it's just minor detail-things which I can come up with for you to improve.
(i'm probably not the best person to tell you this kind of stuff, since my drawings aren't looking half as nice as yours do!)
Well since that was all the critique, now what I really wanted to say: IT'S SO FRIGGING PRETTY!!!!!!!