I tested 10 games from JAM2021 until now (Build'N'Buy, littlelady, lucky dude, modular_portals, subway_miner, snake_3d, grand_theft_box, pacman, buildacity and balloonair) and for me this is the 2º best of then. (1º place to me was Build'N'Buy)
But only work in single player mode, i can't create a local server, the players must be aware.
Hey thanks for the kind words! You're right I didn't make this multiplayer yet; the plan is to allow for a co-op mode soon enough. Only one player would be in control of the level selection and both would be able to collect stars at the same time.