P1 (Bottom): Left and Right P2 (Left): W and S P3 (Top): J and L P4 (Right): G and B If you are not playing with 4 players, AI will play for the remaining spot(s).
Credit to Nintendo for the characters and music. Even though Topper and Spewart's hats are smaller, I made them bigger to make it easier to hit the ball with their hats. Added X and Y Velocity :)