Hmm, this is nice, but I feel it needs more work on the moon and stars. The moon needs to be rounder (try the solid circle, that'll give you a perfect round) and those stars seem half hazard. Best way to do stars is make some fainter, some brighter, and some really bright ones here and there. It creates depth. And since your using Lascaux take advantage of the gradient tool. It's fun to use and you get perfect gradual lgiths and darks.
drawn in 1 hour 4 min