Apart from fixing the problem by not forcing options, but explaining things better at the places where explaining need be done there is an additional thing they should consider:
An additional adult setting. Steam has like 4 mature settings. Maybe more. Too lazy to look it up.
You marked your project by topic, not by graphical matureness. While this is recommendable, the topics you desribe are also not what I would call non safe for work. Playing at work will get you fired at most places, no matter the game, but anyways, there are things not family friendly that do not involve things that will get your game's rating to be AO. I for one can do without a lot of the horror topics. I had a game with a suicide cover image in my recommendations. I would chose pixel boobs over that any day.