2002-12-10 (updated 2016-10-29)
You must finish one by one 80 different stages either by eliminating all the obstacles on the screen or by hitting the EXIT element with the sphere.
In the beginning, you have to indicate your player number (between 0 and 9), and after that you can choose the level to begin with (between 1 and the last stage you haven't loose any racket).
You will lose a life if the control unit hits a white skull or if the power sphere hits either a white or green skull.
You must know that when the control unit hits quickly the power sphere it will pass through and the power sphere will change its direction you can also catch the power sphere with the control unit and release it in the opposite direction of the next move of the control unit.
The power sphere can pass through red obstacles but not through green obstacles.
The control unit can pass through green obstacles but not through red obstacles.

One element has an extraordinary feature: The Energizer (marked with a shaded blue E), if it gets hit by the control unit, the positions of the power sphere and of the control unit are permuted instantly.

There are indestructible obstacles that can be moved with the control unit by pushing the one at a time. Well used, they will allow you to open or close certain ways on purpose.

The blue spots are oil spots which keep the control unit from changing direction until hitting a new obstacle. Some obstacles become solid after you've crossed over several times with the control unit.