As mentioned in another comment, i had no idea the game had started when it began. I also had no indication of what to do from the game itself, it wasn't until I started blindly clicking around I realized "Oh, this is an auto clicker!"
I think a big reason I did not realize this is because, inside the notebook, it was not obvious that the pages themselves can be turned by the folded edges. I was under the assumption that the tabs were the only clickable parts. Perhaps putting an Arrow up at the dog eared pages would make it more immediately obvious to a player going in blind that there is more to read.
I also noticed that lowering the SFX does not affect the SFX for the Notebook.
Overall adorable clicker game. Artwork is easily the highlight here as the characters are absolutely adorable.