Press flag to begin. Slide to 1 for one of the "Best of" variables. If you leave all the "Best of" variables to zero it will keep going through the scores to ten then reset again just to keep going. For 2 player games, 1 is for player vs AI and 2 is for 2 players. Difficulty: 1 is easiest, 5 is hardest. Press play to start the game. The reset button resets the score and also brings up all the game options to change. It's up in the top right corner, you have to hover the mouse over it to see it. W/S keys for left platform and (if 2 people are playing) up and down arrows for the right platform. Also the bot is a bit shaky.
