There’s no way I have time to make a whole tileset. This is just a concept drawing, and a fair number of things would have to change for it to work as a set, too. However I’ve intentionally made it quite easy to work in, so that potentially if it were popular, it could become a community made tileset!
If you feel like tossing in an art piece, the basic rule is that no item should have more than 4-5 colours ideally (1 highlight, 1-2 midtones, 1 shade, 1 deep shade) and things should be a bit desaturated and dirty. Those are just guidelines, but give you an idea… Basically no smooth gradients, no imported cgi or photos.