Are teams allowed? Anyone want to partner up or need help? I'm super interested in the XO-CHIP stuff. Looks like a few small additions have really improved the platform in big ways. I just finished JS13k and now I'm looking for something else.
Yes!
The constraints of CHIP-8 often mean that a single person is sufficient for building a game, but if you want to try something more ambitious (or if you think it will be more fun), working with a team is perfectly fine.
In past Octojams, collaborative efforts have created games like Skyward and Red October V.