It got quite tiring flipping from page to page and I would have liked a nicer interface! I understand the technological limitations of pico-8 and what you've done works, but it put a damper on my enjoyment later in the game.
The game was *AMAZING* though and I've never played anything like it. The dog's AI trying to figure out the code was really believable and I felt like I had just the right amount of control over the outcome - lots of tactics games have risk that boils down to % values, but for me, you managed to get away from that sort of cold numerical analysis really well. In many situations I'd cross my fingers and hope my dog "got" what I was trying to say which imo is truly an achievement, to deliver that kind of feeling/experience.