Pixel canvas for Solana users inspired by r/place.
On-chain board of 300x500 pixels. Anyone can send a transaction to change a pixel to one of the 36 colors. Service fee is 0.001 SOL.
Lock recently-changed pixels for N seconds, or charge more SOLs to change them.
Integrate with NFTs: owner of a pixel can receive royalty fees when his/her pixel is changed.