This is my go-to resource to experiment with dithering algorithms and palettes before coding anything: https://ditherit.com/ If you have your originals in grayscale I bet you can try running them here. Just look at the impact of the very first dropdown to switch between ordered and not.
Viewing post in The Driller That Will Unravel The World jam comments
The results did come out pretty good, I liked it! I'd have to paint a little differently to maximize what it does, but I'll save it for a future project and surely use it. I can already see a great use for it, no better way to show something is alien to have it in a clearly different style, so I can dither with the tool and the alien is my handmade, or vice versa. Very interesting, mucho thank you!