Copy Cat and Monkey See, Monkey Do were clones of it.  
Charles Kapps, author of Introduction to the Theory of Computing, supposedly wrote the assembly code for this game. It was first publicly demoed at Studio 54.  The original version of this game was developed by Marvin Glass Associates and included head-to-head among its three modes.  This game looked and sounded better than the similarly themed Atari arcade game, Touch Me.  The Harry Potter Magic Spell Challenge Wand was essentially a re-skinned version of this game.  The popularity of this Milton Bradley game was helped by an unplanned closeness with how the (*) aliens communicated in Close Encounters of the Third Kind.  This must-have toy of the 1977 Christmas season was designed by Magnavox Odyssey inventor Ralph Baer.  Copy Cat and Monkey See, Monkey Do were clones of it.  For 10 points, name this electronic game where you have to memorize and then repeat a musical pattern using one of the four buttons.
Charles Kapps, author of Introduction to the Theory of Computing, supposedly wrote the assembly code for this game.
Simon