Nice game! It reminds me of Banjo-Kazooie and certain Mario 64 levels. I had lots of fun flying around and I loved the book gliding animation. The music and sound effects really fit the game well, I especially liked the noises the cultist made.
The controls were pretty good, but it took me a while to figure out that the best time to start gliding was immediately after jumping - usually I would expect I should try to glide starting from the peak of my arc, rather than at the start of the arc. Also, it seemed like there was no good way to “resume” gliding once you cancel it, which threw me off.
The platforming was a fun challenge, but I would have liked a little more difficulty dealing with enemies too - I think a cultist only captured me once, so maybe giving them a little more aggro or some additional enemy types would have been more challenging.
I did have to download the Linux build as the web version was stuttering quite a bit, but it ran with no apparent issues on my Steam Deck.
Congrats on the entry! This was a fun playthrough.