Training app for indoor sports "squash".
You hit the shot realistically on the court and the ghosts move virtually in the device.
Your mission is to return the ball to the green area where there are no ghosts.
Two bounces in the green area in the real world is your winning shot.
The ghosts detect the bouncing sound of the ball and move quickly.
Eight levels of difficulty and 10 levels of microphone sensitivity can be set.