If you want that game then make it! that's the beauty of games! this is THEIR vision, not yours! if you want a FNAF dating game where all the genders are kept you are free to make one!
If it were possible for me to do so, I would gladly take the opportunity. In fact, I would be willing to invest in outsourcing the task if I had the financial means. I recently came across this game and it got me really excited. While I was a bit disappointed to find out that the game was designed with a purely heterosexual theme, I want to clarify that my disappointment was not meant to discriminate against the author's creative choices. I would appreciate having a broader range of options beyond chicken, fox, and cross-gendered males.