Click the flag, wait 2 seconds, then the cat will follow your mouse. Up to a maximum of 12 people can join. You have to have a full Scratcher account (no unsigned in people or New Scratchers, I have no control over that). If the servers are somehow full (which shouldn't happen since not many people view my account), wait until someone leaves and then click the flag to retry joining.
Untested with more than one person but in theory, it should work. This is an improvement from Plex's original project I made. I figured I'd show him (he's a friend IRL) how complicated bigger and more advanced multiplayer projects are. Now time to get to sleep, it is almost 2 in the morning.
