Nicely told.
The Persephone story is one of the ones I heard on my mother's knee, and then retold so many times over the years by different authors in different ways, but I've never heard it in such a refreshingly matter-of-fact, liberated, and humorous fashion.
I enjoyed Diana Wynne Jones' Tough Guide to Fantasyland, and this seemed at first to be a similar kind of text: a set of hints for prospective writers and readers of funereal fiction. But instead of navigating the common tropes of world mythologies, it sticks to the single locale, which was a surprise, and builds a consistent world from its capricious rules.
The ending was odd, though. It just stopped. It stopped on a good gag, but I think it needed a conclusion of some kind. Something to bring the five rules together, or a twist on the nature of the rulegiver, or a reflection on the inevitability of it all, or something.
That was a fine reading, which served the material very well. If you'll forgive a parochial British point of view, the Antipodean accent helped paint a picture of a tourist guide, or possibly a work mentor on some kind of gap-year overseas working holiday. I don't think a UK or US accent would have sounded as 'authentic'. But the delivery really sold it.