Press Any Key to Start/Reset game(Start in 2Player mode see below how to play 1Player.) First to Five Wins Controls: P2(DK Jr)- Arrow keys P1(Baby Mario)-WASD Press the "C" button to switch to P2 single player. Press the "1" button to switch to P1 single player. Press Both "C" and "1" buttons to switch to CPU vs. CPU. Press the "Space" Button to switch back to 2 player.
Update: Added score system thanks to @bread-games code in Paddle Football When Playing Against DK Jr CPU he glitches sometimes just tap the arrow keys and it will fix it