I was going to say that I enjoyed the music + sound effects. I read that you made it yourself, nice! I'd go for the loop option also since you had other things to worry about in this game jam xD Like everyone else, I was clicking on the notes instead of the red button but I think that's because they didn't look like buttons to me at first until I started clicking around like crazy!
It took me a bit to figure out why I was getting what I was getting wrong. I only figured it out because I decided to not click on any buttons and got +10 points on letters that weren't from the word "copy." It's challenging in a good way because not only do I have to time the red buttons to zap away the letters, but I also had to spell "copy" over + over in my head to see which words I had to zap xD nice game!