@Clearedeth

Wow! That is superhelpful! I wonder if you can do that in Pyxel Edit? Thank you! I'll try this trick out for my next attempt. Appreciate the criticism! 

Wow, this is lovely.  Always enjoyed your work.  Only thing that sticks out at first glance is the grass/moss on the tiles; they seem overly bright.  A possible solution would be to lower saturation, use cooler colors, or use more of the darker shades.  A little trick I learned in a color theory class at university is to use a program to convert the image to black/white or to simply squint your eyes.   In the image below you can see that the grass/moss is a much brighter tone than the block.  If we're using a logical lightsource, the grass would be a somewhat similar shade as the block (not 100% the same of course) since it's facing away from the sunset. 

Hope that helps:

http://i.imgur.com/AUqS9KM.jpg