Well.. I barely have any submissions here in PJ, so I thought I'd try to add some. These are two screenshots from a game I'm making, all the tiles/bg/sprites/etc. were done by me.

I gave myself color restrictions for both areas.

Forest(1st): max of 2 shades of green for all bg's, sprites, etc.

Mountains(2nd): max of 3 shades of blue, and 1 shade of green for all bg's, sprites, etc.

The game is far into development, and you can see it by clicking  below.

gmc.yoyogames.com/index.php