Heya i'm interested in speedrunning this game, but as i can see the current WR uses the duplicated stamp mechanic which got recently fixed. So my question is if we could have a new subcategory under any%? if it's possible to downgrade the version to get access to some older glitches let me know it pls.

Yeah just got that same feeling. This game is very cool!

The new updates for the game have made many of the normally slow parts of the run much faster. While it would require coming up with a slightly different route, 3.1 could be just as fast as release version