You have a large selection of balls to choose from. They have different designs and stats.
If a ball has a high “Ball health”, it will bounce longer. Also if a ball has more “Starting Balls”, it will have more balls to shoot since the beginning of his first turn. You can select the ball to play directly from the “Balls” menu inside the “Shop”, or in alternative, you can access it from the game’s main menu (next to the screens edge)