Of course there is a want. But a need? The problem is, that tags on itch are not accurate and there are just soo many tags becaue they are freely choseable. The list in browse is incomplete by far. A developer can even publish without any tags. And regarding horror, that is often tagged for stuff that ain't really horror.
It would be nice though to have the existing capability of filtering out a single tag as an element of the browse user interface, instead of having to paste it manually in the url.