I really like the overall scene. Although 1. The reflection seems brighter than the character, which never happens! Try to lessen the brightness a bit and add some lighting on the main character 2. The rocks you used in this picture has a different lighting angle than the composition itself, which is seeming very odd to the piece! Try a few other rocks which has back-lit lighting environment! and 3. the stars are too blurry and dim. Make them more bright and crisp, I don't think they are blurred because it's not focused. If that was the case the moon would have also been blurred!
I really hope this helps. I don't write much critiques, since I don't like pointing out people's mistakes :S But I really enjoyed your thoughts over this. So I suggested a few things! I hope you don't mind