Use your mouse to move. You are purple, other players will show as orange. Three players are currently supported for simplicity but, when finished, this engine will be able to support a large number of users. Currently this is a pretty rough and unfinished multiplayer engine. I am working on turning this into a fully functional but simple multiplayer engine that I may use in projects in the future, and which will be free for others to use. Although I am pretty inactive on Scratch these days, I will still check in once in a while and create projects.