Categories for the individual levels would be very nice. Would probably prompt more people to join, as one level isn't quite the commitement as the entire campaign.

I agree about new categories, so I'm considering all suggestions!

Are we going to add the Madness Difficulty speedruns as subcategories?

madness difficulty as a subcategory is already available. As you can see, there is no madness difficulty in story or arena because that difficulty is not available on the first playthrough. For story, I created the category all missions, there is the possibility of passing on madness difficulty. In the speedrun of individual levels, madness difficulty is also available