This game was entered in the IF Art Show, a competition over the years that asked participants to create portraits, still lives, or landscapes using Interactive Fiction.
This is a still life of an electric guitar. Rather than playing specific chords, you have an amp and a patch cord and knobs affecting treble, bass, tremolo, pick up, and so on.
Not knowing much about guitars, I just fiddled around, but it was a lot of fun. My favorite moment was when the parser recognized "PLAY STAIRWAY TO HEAVEN".
Recommended for fans of other art show pieces like Galatea or the Fire Tower.