Brutal difficulty just released and I wanted to post a run but I don't know if I have to specify the difficulty or if the only runs accepted are in Violent difficulty.

I could be wrong but i think you can run in any difficulty

Wait, does that mean that the world record can be in Harmless ?

yes but mst people use violent because enemies are faster

At the moment you can run whatever difficulty you see fit, however the most optimal difficulties will always be harmless (For when there are no enemies or at least very few) or violent (when you have an arena or multiple arena's to clear) We plan on adding something for other difficulties later down the line, most likely when we get to 1.0 (Full game release)