Really badass puzzle game, a perfect balance of the theme for this jam! I only had a few gripes, but they were worth working through.
My first issue was the reference board. I didn't know the reference board behind the desk existed at the beginning of the game, so instead of referring to the first note I received, I had to alt tab out of the game to access the reference I needed in one of the game's screenshots. I was getting mad because I thought the references I was grabbing were disappearing to nowhere! Then, the character references the board with information on it for a different puzzle. Perhaps he should have said "Ahh, a note, I'm putting this on my reference board just above the desk" the first time he got something. Or, the game could have started with the camera entering the room with a full view of the room before sitting at the desk, and with a different note than the rest (probably a briefing) on the board so you're forced to interact with it before doing anything else.
Anyways, the other gripe I had was with the musical notation. I know how to read music, but it isn't so much use if I completely lack a clef to work with! Is it treble or bass clef? I was having a hard time matching the notes up with the ones on the paper, and I realized I was defaulting to treble because that was the one for the instrument I know, but it could easily be bass clef and I'm none the wiser. Also, some of the notes on that paper were very ambiguous, like I'd see two notes on the thing and they both look kinda like a G, but one note is higher or lower than the other but not all the way off the line so I wasn't sure. It was distracting me and making me a little upset... but nonetheless, I guestimated and still managed to win