yeah, we made it 2 player only. The button wont light up until the second person joins.
My brother and I are really focusing on creating similar experiences to it takes two or overcooked, and decided each game we would make would be a multiplayer coach coop type game.
I know that's not ideal for a jam, and we went back and forth on it, but in the end we figured these are good learning experiences for us and decided on keeping it 2 player.