Harry's Pong

The author of the Unofficial Harry Potter Joke and Riddle book has done it again.
He has made a ping-pong game with the Golden Snitch. Just hit the snitch with your wand. hold the wand on the right by touching the screen below and to the left of the wand. Move it up and down to block the snitch.
Try to get ten points before the computer, or is that other wand controlled by ???