I LOVED this game SO MUCH. The game definitely was from the overarching lore and what happens if you don't exactly do as Aniliade told you (I really loved your attention to detail for that).
I loved the animations in the game, Aniliade felt super duper expressive and filled with personality. The writing in the dialogue was also super well-done -- Aniliade really felt super fleshed out and funny :) I picked up Yarn https://yarnspinner.dev/ for dialogue in my game and I had a great experience with it (made it really easy to iterate and drive game events from the dialogue system). It could be worth looking into, it's used by other games like Night in the Woods and A Short Hike.
I actually loved the boss fights quite a lot! The anticipation you built into each animation was really well-done; I was able to learn the boss's behaviours and adapt to its various patterns. I also love the ramp up as I went from one boss to another -- although the patterns were mostly the same, the smaller window of attack demanded that I learn how to exploit each of the boss's attacks. The fact that the boss doesn't start attacking you until you attack it first is also a nice touch.
I love how the camera kind of focuses on the boss. I think that cameras are deceptively difficult to get right (I don't feel like mine is the best either), but I definitely felt that Cinemachine helped me a lot with making a (mostly) solid camera. I can't tell if you're already using Cinemachine, but I thought it's worth the plug (because I learned it in this jam and really loved it)!
I love the art (not sure if you already have bloom), but post-processing can really help a game feel more polished. I'm sure you already know this, but a hurt animation for the player would help signal to the player "hey you're being attacked, maybe dodge or something?"
Really wished I could fight Aniliade at the end, but I totally understand given the time constraints. Regardless, this is a really solid submission! I thought the game felt incredibly polished, I didn't really notice any bugs at all :) You were really good a prioritizing the core gameplay experience and making sure that it feels super polished.