Players are dropped onto a big square of slime blocks, and the aim of the game is to knock everybody else into the void. But you can't stay still as the blocks break underneath you, and running on slime is too slow, so you have to keep bouncing. You start out with a basic weapon, but you can use your parkour skills to jump on the surrounding islands to get better weapons that will make it easier for you to knock off your opponents or break the blocks from under them. Good luck!
