I don't know a whole lot about clients talking to servers and stuff but maybe you could add a AI for every player playing? So, when you connect to the page two people spawn, where you control one guy and the other dude is an AI. But all the calculations could be done on your own computer so as not to lag out the already-bad server. b/c its kind of boring when nobody else is on. Otherwise, it's really cool! I opened it in two windows and had fun killing myself.