Absolutely loved this one. Very difficult, but incredibly satisfying when you get a room down. Took a playtime of 55:35.966 and 268 deaths, but I really felt compelled to collect everything, and enjoyed doing it.
After the struggle to master those rebounds, using one to disrespect Boyhowdy like that was the perfect reward.
Also, it's a smaller thing, but using Keener's Goblic Endowment as justification for them showing up everywhere to tutorialise is just a really nice little touch. Wonderful job!