Glad to hear about the upcoming 1.01 version! Ah, I see that correlation was not causation with the instrument. Turns out the time it takes to equip it and play a few notes is longer than I tend to hang around in the pool.
I'm unable to decipher whether you are hinting at something with the symbol beneath the stairwell... it looks kind of like a doorway or a top hat (Dazzling Headgear?). The crates are preventing me from getting a closer look.
Thank you for the hint about the statue room, I now feel like a monster.