This is my first attempt at a multi-player game! There are 2 server slots to join, and the server will tell you if there is no open slot. If there isn't you can come back later. Use the left and right arrows to move your ball and stuff. If there is another player, you will see them move too! This is more of a tutorial than a game.
I found some useful information on Youtube, this video in particular: https://www.youtube.com/watch?v=jvwHPaoiHP4 If you find any bugs, let me know.