I don't like this. Seems to me like there's room enough in "Misc" for as many extensions as we find valid. But if it helps with the tensions, fine. Wouldn't want to lose cool runners over it. 🤷

As far as extension categories, no one is stopping you from running them. Run whatever extension categories you want. Post about them and if other people run them, I bet they'll get added to the board. I don't know why there needs to be a category listed on the board before you speedrun it; this is just a tracking site.

Individual levels seems really off to me. I've not really seen that in other games. Some games have like a wiki where they show stuff like that off. We could always pin a forum thread for cool tricks. I would think every game has tricks that are cool that don't make it into any%; certainly all of the other games I watch do.