I'd think that the moon should be on the other side so the lighting would be correct. Other than that, the focal point didn't really jump out at me and the render looks too bright to be in a night time scene. Other than that, it's good.
There is an alternate lightsource besides the moon, I tried to make the moon too far back to have a giant impact on the lighting, also there is a black cloud in front of it. I think that I do need to work on the focal though.
The moon is still way too close for the lighting you have there. The color compo is also mis-matched. I think the c4d is also covering him a bit too much but other than all that I really like it.