With the help of the game Hole Ball, you can check your attentiveness and reaction speed. You will see a playing field on which a white ball will be on a certain line. Above it at a certain height will be holes. Below you will see a floor studded with spikes. After a while, they will begin to rise up. You will have to use the control keys to rotate the line in space and make the ball roll over it to fall into these holes.
