It took me a moment to realize this is a two-player game. That's definitely an interesting choice as well as one that sets the game apart. Itch.io doesn't seem to want the second player to move, but it's fair to say both players have the same "moveset". Edge barriers could work wonders because the player characters can exit at any time, and I would've loved to see more moves - a strong attack and something for blocking, for instance. Being able to pick other player colors could also be an interesting addition and wouldn't be that hard to program, but I still had fun.