You mentioned that the game needs to be about boy love well that's the name of the game jam, but does it specifically need to be about love? Or can it be just about boys.

For example if a game has a guy as the main character does that count? Or do you mean that the main characters have to be lovers or involved in some sort of romance.

Also can the game have a girl MC while being themed around boy love like probably a girl saving gay relationships or something like that.

also, also, do brothers count?

Do VN counts as game? 

This is my first time hearing the term if you haven't noticed so apologies if I made a mistake.

Your game must focus on queer relationships between men OR the queer male experience. This includes: gay, bi, trans, non-binary, aro, ace, pan, any male-identified LGBTQIA characters.

So while romance is not needed, the central character(s) must be male-identified LGBT+. 

Yes, Visual Novels are games.