This is a nice piece.
I think there is a minor problem that the designs on the right are somewhat disconnected from the dancer on the left. The designs were a good backdrop in the original but the spotlight/window kind of breaks them apart. Not a major problem, but maybe something to brainstorm on.
I think the lighting on the extended arm isn't consistent with the lighting from elsewhere, but you might get away with it. Showing that this is an arm is more important than perfect lighting.
I did a quick edit.
1) I adjusted the left line of the torso to give her a waist and hips.
2) I tweaked the hair to give it a little texture. Not a great edit but I hope it gets the idea across. I think the hair could something like this. Maybe you can connect the hair (by style or directly extending it) to the designs on the right?

Hope this helps,
Tourist