I also find this concept fascinating and made something similar a while back [1][2] but came from a slightly different angle, where people can compete for the title text on the page, for colors and for pixels in a grid (like a small r/place).

It uses Peer-2-Peer in the browser and I haven't touched it in a while, but it looks like it still works. :)

[1] https://tropical.pages.dev/pow/

[2] https://news.ycombinator.com/item?id=38934607