Works fine so far, pretty good base for a multiplayer brawling game.
While I understand this is a demo, I feel like the system is developed well enough to dedicate just half a day to add a simple goalpost for players to play with during the jam.
Maybe just a simple score system for when players get pushed off the stage, or just some "break the targets"/"board the platforms"/"collect x pon de rings"/"reach the flag" thingy and see which player completes it first etc.