Ruined Canvas

Ruined Canvas is a fully on-contract canvas of pixels running on Ethereum mainnet.

Users can first join, and then are able to paint on a 1 block cooldown.

Joining mitigates a single user from flipping large portions of the canvas in a single block without paying the up-front cost beforehand. The number of addresses you join with is proportional to your ability to flip larger sections of the canvas at once.

The canvas is fully on contract, anyone could host it just by reading chain data.