wow, on my end I only see it correctly, I tried to look at the post from the jam compared to my page but its the same, it might have to do with the way godot proportions its playing window or something else, idk though.
go into godot project, project > display > window, and take a note of the
"viewport width and height", and then go to your games edit page in itch.io, and match them with what it says in godot.