Cool. Has an old school. Mainly due to the "muddy" colors I think, which do lend an interesting ambient vibe. As far as content, only thing I would change is the moon. It's too mundane; looks just like what we see as we look out from being on the earth. How about two moons?
the dithering in the sky is a bit overboard but otherwise it looks great! One of my favorites.
The original plan was to have a few moons, but I felt the image was getting too busy for its own good. Its hard to fit in everything you want in the small size given.