I think that I would like the option of trying to remove results via negative tags.
Maybe just switching the settings option would help with removing the clutter of lewd games, but I think that it's unfortunate that "adult" seems to be considered to just mean "pornographic".
Though I currently haven't made anything that I'd tag "adult", I could easily imagine doing this for a game I'd consider "R18+", where due to subject matter and themes; I'd feel more comfortable making sure people are aware that I'd really prefer that the game isn't played by children and is intended for adults. I'd like to imagine that I'm not the only one with this thought process.
I think I'll just switch off "adult games" for now, but I wish there was a better solution to this.