Where should we tag if our game is planned to have some body-horror and other elements in it? Should it also be in the description somewhere? If so, where, and how should it be written?

Hi. Our recommendation is that you do these two things:

1. Edit game > Metadata > Classification. Turn on both Audience & Content settings.
2. Add a content warning on the page itself in the description.

Thanks for the question, we should put this information on the jam page itself soon.