If you can get 1 other person in addition to you that want that category I'll add it but Demo% is (in my opinion) a pointless category. The only time you would need a Demo% is for something like Resident Evil 7 that had a demo different from the main game. For a cheap simple puzzle game like this where the demo content is the same as the main game, a demo category is completely pointless and just hands a free world record to someone that won't buy the game.
So while I do not like, nor do I approve, of Demo% as a category, I will add it if you get 1 more person to request it. But I want to see runs from BOTH of you if I add it. If you get a friend to request it and I never see that 2nd run get submitted, I reserve the right to remove the category. I want 2 runners to prove there is more demand for it. I'll be happy to add it if that requirement is satisfied.