i don't have too much to say that hasn't been said already, the writing that's here is great!
i like the sort of way each page has its own nested subpages--this seems like a nice way to provide more context for the reader, similar to footnotes, etc. but i think they're used super effectively with the potion ingredients scene, where we can imagine ourselves taking out each ingredient from the box, then putting it back, and i love this specific line from the black key: "You're okay. You're great, in fact. So great that you're going to drop the key right now and grab something else. haha." just a super creative & fun way to have the page navigation work.