I had a fun time playing this alone, but unfortunately I didn't have much luck getting multiplayer to work. Based on trying out your early square art version, I'm sure this is also a lot of fun in multiplayer =). It's really impressive how much you got done in this jam, and I'd love to see this with multiplayer working again! I didn't think to check the console when I was playing, but I tend to think you have a deadlock or an infinite loop when additional players join.
I also just really liked all the customization options for the game, and being able to set your own cheers!