Move the mouse to move your paddle — up takes it toward the net, down pulls it back. The mouse is captured while you play so it can't leave the window; Esc releases it and pauses.
Drag one finger anywhere on the screen to move your paddle — up takes it toward the net, down pulls it back. It works like a trackpad, so your thumb stays out of the way; lift and drag again to go further.
Get in line with the ball and it returns automatically — forehand or backhand depending on which side it comes to.
Swing as you hit: flick up for topspin (fast, dipping), pull down for backspin (slow, floating), flick sideways for sidespin and angle.
Swipe as the ball reaches you: flick up for topspin (fast, dipping), pull down for backspin (slow, floating), flick sideways for sidespin and angle.
Read the spin: the trail shows it — orange topspin, blue backspin, purple sidespin. Blocking backspin drops into the net, so lift it with topspin.
Click or tap to serve. M mutes.
Tap to serve, or flick as you lift your finger to serve with spin. Use the buttons at the top right to pause or mute.