Hi! Is it possible you could show a screenshot of what you mean? I'm not sure I see that on my end in the demo. Also, your device and resolution may help, in case it's a scaling issue. Thanks :)
The only thing I changed is renaming the inner folder to Game so Renpy can run it, and putting the game in the same folder as my other renpy project. though I re-downloaded and it's still the same thing. But I think I figured it out. in the message_viewport, you defined the ysize to be 750, so I removed that line and it somehow auto-scaled on its own with the correct ratio O_O