Pixelzone.io is an online pixel game where you and other players can draw anything you want on a board that everyone can see.
Each player has three seconds to place one pixel on an 8192x8192 map. The goal is to take over other groups' land, fight for your own, form alliances, and start wars with them. Each player can make their own faction, or they can join one that already exists and help it in some way.
Have fun and good luck!