I don't care that much for graphics but as there is no gameplay additions to comment on, I will write what I like and esp. what I dislike about the screenshots:
I really like the idea with the angry moon a lot, the color scheme is well chosen, too, and they all have a nice atmosphere.
I must admit that I really hate (!) the staircase (shot 6), it looks like A4. The flares are too big, they almost take a quarter of the screen. I would add (at least simple static sprite) shadows to the objects in screenshot 5 so the models blend nicely into the level. The explosion (shot 7) looks nice but the room itself stays dark, if possible, add something to brighten up the scene (f.i. a dynamic light if the vertex lighting does not look too bad).

Just my 2 cents.