Never has calming harp been so stressful :D
I had fun with this, cool how you made the chord less harmonic when I messed up.
Did you work with probability tables? Like after Cmaj7, 50% chance of Am7 etc?
I listened to a podcast, Game maker's notebook, an interview with Chance Thomas who explained a very advanced system he made with different moods that used different tables to set up chord progression. Quite interresting.
Did you have one bar per file and play next on callback from audioplayer?
Cool entry, very nice!