Click <green flag> twice: sometimes it glitches. Black dot: <a> to move left, <d> to move right, <w> to jump, and <s> to shoot. White dot:<left> to move left, <right> to move right, <up> to jump, and <down> to shoot. You each have ten lives. The point is pretty clear: Don't die. And if you die, hit yourself on your head and say "Poopsies"
Thanks to @judes21_lms for the idea of a shooting multiplayer game- Thanks to @cecip21_lms for helping me with some minor script errors-