This game is a mash-up of the 1977 movie "Close Encounters of the Third Kind" and the game Simon, which debuted a year later in 1978.
In the movie, people attempt to communicate with visiting aliens by using a 72-key lightboard, as re-depicted here. Watch the youtube video of that "conversation"...
Press the "start theme game" button to play the "conversation" sequence of tones.
Press the "start random game" button to play a random, Simon-like sequence of tones.
Press the "strict" button to turn on the strict playing mode where no mistakes are allowed!
Get 20 correct tones in a row, and you win! Good Luck!