You can control which direction the ball travels in the game.
[PULL]
You can pull your shots to the Left by letting go of your swing earlier than the exact hit timing.
[PUSH]
You can push your shots to the Right by letting go of your swing later than the exact hit timning.
'Exact hit timing' is indicated through a bar (red-green-red) displayed right after you hit the ball.
To get a feel for how to control the ball, you'll need to get a feel for what is "early" vs. "late" by practicing your hits and observing the indicator.