You're right, I should have noted that Fool was a major inspiration. Guess I'll say it right here.

 highly fool inspired always post your references please.

nice! 

dudee excellent use of the limited pallette!

 *squints* is that a blimp in the distance? Either way, great rocks/mountain ^^

Edited to remove jaggies and show scale.

It looks more like a pile of rocks than a mountain, although it does look nice. Why? Cause all the "rocks are so clearly defined and flat on top as opposed to slanted vertical planes that intersect each other here and there. A quick fix might be to add a small tree or something similar to show the scale of the mountain.

I mean the pixels in the background, a lot of them looked unclean. It's hard to describe, but there's jags and general randomness that could be fixed with a few minutes of cleanup. It's hard to explain, but basically, fix the pixels in the highlights of the background mountains.

Other than what solarlune said, what could I do to polish it?

I tried to steer away from shading them all like the top few rocks, but am I wrong about that?

I like the background mountains, but the foreground one kind of blurs into the background ones a bit too much. Maybe you could use the darker colors moreso on the foreground mountain and shade it a bit more, or outline it. Anyway, nice job! I like the cool color selection, as well. 

It looks really nice, but it's still kind of unpolished. You're not finished, good sir!

That is indeed a zeppelin.

So glad you all like it!

 Awsome! is there a zepplin in the background?

 nice 

Lovely! This can be a good reference to many newbies :)

love it, great sense of distance!