Instructions

Control bat with mouse (or touch screen on mobile) - Swipe the bat up while hitting the ball to apply top spin. The ball will spin forwards and accelerate downwards. - Swipe the bat down while hitting the ball to apply back spin. The ball will spin backwards and accelerate upwards. - Likewise applying side-spin causes the ball to swerve to either side. - See https://en.wikipedia.org/wiki/Magnus_effect