Thanks, multiplayer was something I wanted to attempt for several Jams now. One of my previous games was sort of similar, Team Codebreakers MMOG was realtime multiplayer. I discovered late in the 2 days that the back-end I was using wouldn't work from a WebGL build, so that became a Windows Executable. Hence it kinda never really took off.
This time I wrote the back-end from scratch and hosted it on my own site. That way I can be certain it will work!