Hello, I have multiple games I was going to be involved in making music for, I didn't see anything in the rules about being on more than one team, just asking to make sure that's okay.
I suppose that is alright as long as there is a team lead and you discuss how the money would be divided if that game won (even if its only $20 lol). If you were on the team of the winning game then you would also be credited as the winner.
