as suggested in this closed topic -> https://itch.io/t/1270743/new-filter-exclude-genres

I also would like to know how to  select multiple (or exclude) genres in games filter... i think there are too many visual novels.. is easy if you want to select visual novels, but for the other genres you have to select and browse lists by one and is very tedious

An additional benefit could be in comparing games.. lets suppose you filter games by "action" and "platformer" genres, then you could sort and compare games together by dowloads, votes or whatever