On the screen are displayed four coloured sections, each with its own sound and a corresponding cursor key. The computer will flash one of those sections and play the appropriate note.

The player must then press the corresponding keys must be pressed in sequence. The number of notes played will increase by one each turn until an error is made by the player, when the score will be displayed.

Simon's Game was written for the BBC B by N Mirza of Edgware, Middlesex.