Awesome work! Great use of color!
Thx,but I have to confess :) Everything as been drawn in black, it was the simplest and quickest way to drawn 1400 sprites, and the color gradient are generated by post processing, so I had the idea to make biomes with there own unique colors :
pink/purple : vaporwave city
red/orange : volcano/desert
green : jungle/forest/mushroom
blue : coast