No, I'm not asking what key a guy named Simon is singing in... I'm wondering about that electronic game from the 1980's, inspired by the movie Close Encounters of the Third Kind.

The machine plays four different notes randomly, in an ever-lengthening pattern, and at an ever quickening pace. You have to play the sequence back without a mistake.

An online version of the game is here: Simon/Flash (requires flash to play).

Anyway, what little knowledge I have of music theory includes this tidbit: You must end a tune on the tonic note of its key, or will feel incomplete.

The thing is, no matter which of the notes Simon ends on, the melody sounds "right" and "finished" to my ear (and, most infuriating, each of those random tunes is liable to get stuck in my head). So I'm wondering what key that is...

Also, has anyone out there familiar with the game tried to use Simon to compose a song?

(I warned you this was silly!