The animation was jerky and it sounded like a 1980s video game, but it worked!

(The 1985 Atari video can be viewed here.)

In the first version of the software, I had to enter the music by converting it into numbers and typing them in; these are the numbers for one measure:

    03700 MM13     .HS 0429032D02000100
    03710          .HS FF0002
    03720          .HS 0428
    03730          .HS FF0002
    03740          .HS 042903000239
    03750          .HS FF0002
    03760          .HS 042B0237
    03770          .HS FF0002
    03780          .HS 042D0235
    03790          .HS FF0002
    03800          .HS 04288234
    03810          .HS FF0002
    00820          .HS 04298232
    03830          .HS FF0002
    03840          .HS 042D0230
    03850          .HS FF0002
    03860          .HS 0428822F
    03870          .HS FF0002
    03880          .HS 0230
    03890          .HS FF0002
    03900          .HS 641F022D
    03910          .HS FF0002
    03920          .HS 022F
    03930          .HS FF0002
    03940          .HS 041C60200200
    03950          .HS FF0002
    03960          .HS 022f
    03970          .HS FF0002
    03980          .HS 04218230
    03990          .HS FF0004

A single two-minute piece took me about a week to enter. I swore I'd figure out a better way ...