Too dark, and the lighting is off. The figure should be showing a backlight glow around the edges of her, and the viewer would not be able to see just patches of skin, she'd be all in shadow (to match the rocks on either side)...

Nice concept, but the execution is unrealistic and inconsistent with that background...Sunset or sunrise (or an angled moon on one side) would better illuminate the subject.

lovly.......

nice work author...good luck

Not enough contrast, chick should stand out. That's why instead of the same type of dirt/rock, you should have used white marble or something different from the background.
Or make the moon behind the girl and that would make it perfect since you have white vs black = great contrast, great impact.
Full moon also equals shadows.
But this is a good start & you'll get better man, I'm sure.