This game jam is small, I think GDevelop is losing their >1100 joined and >600 games on the BIG #5 only because of that rule. And som of them may never return, even if they wanted to submit to this jam.
If the BIG game jam 7 will not be multiplayer, I'll try to make a game and to find yours, cattymations, and then, of course, play it and vote it. Good luck in the next game jam!