Thanks, it was my first.  Working on another now.

Made some comments on the WIP forum. Looks better since the previous version.

Hmm, don't know what happened there...  does photoshop mess with the colors slightly or something?

This actually has 58 colours instead of 17; therefore, I'm removing it from the challenge.

 Shading on sand could be more umm ''sandy texutred'' .

The slight shadow you put on the clouds and moon give them an interesting, slightly 3D look. They're kind of like cut out pieces of paper glued on a background.