Thank you, i'll see if I can change the moon's outlines.

A very sensitive piece - would have to agree about the thick outline around the moon, though - makes it look like another piece of (dome shaped) mountain - since you've used a very sketch-like technique, I'd suggest taking it a little further - incorporate the "incomplete" line drawn to imply that your light source floods the object and the eye is allowed to complete the line due to the illusion created.  Thus your moon should seem more 3-d and distanced from the middle ground.

I love this piece - well done!

 very cool, for the most part.
looks like a pencil drawing!

the edges of the moon/sun? could be better, without that thick black line.
still pretty awesome.  good job!