This is a really fantastic entry! The gameplay is simple and easy to understand, but it scales up nicely. Lots of great feedback and sound effects, nice touches like the book also lighting up the elements you've already got selected, and I love the cozy vs time difficulty option!
My only trouble was that it was sometimes hard to read the book, but that was solved by hitting the enter key like you have written. I think having that extra diegetic UI was absolutely worth it. Amazing job!