Oh wait, the book is a bit smaller in your animation. Did you reduce its size?
Viewing post in v1.1 - Page-flip animation comments
It's ok, no worries! If you used the 3x version then maybe it's an exporting issue, because the gif you uploaded is slightly smaller than my 1x version, which causes some undesired pixels/noise. If you could send me your original file (.aseprite or whatever you use) to franukai@gmail.com it would be great!
https://drive.google.com/file/d/1Gr-yks1RJ6sbjvRxXNHrpdE32U7llZo4/view?usp=shari... Hopefully this works for ya. Tbh I'm not really certain whether it will actually be useful, but in any case now you have another idea to add to the pack!