You have to construct the the bearing on the upper left. When started, this machine will eject two kind of balls. Silver balls, wich must be collected in the three pits above, if open. Copper balls, wich can be forced to collide with the silver ones by using the flippers. Take good care of your copper ballas, they can easily be destroyed by several obstacles. With the last ball, you will loose the game. Be quick, as well, your time is limited. In addition you should try to collect as many score-points as possible. Press space to switch open pits, X for left flipper and M for right flipper. Press shift to punch the machine. switching pits will generate a temporary magnetic field that may attract balls.