I found the concept really interesting! The idea of finding and examining books for excited fairies made for an interesting game idea - especially figuring out who to give what books to. The trapped books threw a wrench in things, which has the benefit of involving Patchouli and encouraging getting information on who'd like a particular book - and has the drawback of burning time away from getting the books to the fairies in time.
The backstory with Patchouli x Koakuma is very cute as well. On top of that, the books themselves have fun bits of writing. They keep the topics concise and don't go farther in depth than necessary, but they do give me a good idea of what each book is about and helps showcase the concept.
After streaming, I discovered that the code was AI-assisted (evidently referring to genAI). There are tools online that can check for minor issues (ex: missing commas, brackets, etc.). For finer details, I encourage you to seek out experienced people in the game dev communities! There's no harm in looking around & asking for help, whether for advice or even for programming partners as a team. It's a part of how one learns, combined with studying and the hands-on approach - and that especially goes given how much goes into a game project (music, visuals, programming, writing, and more).
Otherwise, you did good on this! It was worth playing.
(•ᴗ•)