Great color use, as was mentioned. I'd recommend two things for you to work on now: first, a foreground, you have a good contrasty midground, but nothing in the foreground to suggest the materials of the environment, a closeup of the further details, a reason for the events in the image etc.
The second thing is a selling point. While the coloration and contrast looks great, the images should have some interest point, something unique that you want to convey in them, the reason for the existence of this while environment.
Keep up the good work, looking forward to seeing more~
Perky
Z. R. joined
Concept artist~ Send a pm for portfolio, since I can't post any links here.