How do I make my ball don't fall while having physics?

Hi everyone,

I'm making a PONG game in portrait mode for phones and the ball after losing it's initial force it starts to fall down and the Racket on the top can't hit it, How do i not let it fall?

Thank you.

Set physics world gravity to 0. Also, it may be much easier to use Bullet behavior instead of Physics, just set "Bounce of solids=Yes".