Abstract: A flipper game apparatus comprises an inclined playing surface on which are disposed switches adapted to be operated by balls rolling over the playing surface and encountering the switches. A ball is introduced on to the playing surface by a respective player and rolls down the playing surface towards the outlets, passing the striker switches as they do so. The outlets are flanked by flippers which can be actuated by a respective player. So that two players can play at the same time and in mutual interreaction, the game uses balls of first and second different types, while operatively associated with at least some switches is a sensor which is responsive only to one type of ball. A circuit distinguishes the types of balls from each other upon actuation of a switch, by means of the respective sensors.