Tutorial in the comment below

First, start the game by at least two normal taps with no movement (but keep the bar thingy still), then aim for the ball with the left or right corner of the bar and push the bar really hard (but don't lose the bar!), lastly the ball will be rapid fast so get close and stay still for a while until the ball either flings or you get bored. If you don't understand, here's a video showcasing what I just explained.

Gg

Gg

If you think people actually play normally and get thousands of points then watch this