I'm making a game but I really don't know what kind of fetishes put into it... I mean, I only know foot fetish and light femdom, do you know other (maybe quite popular) fetishes?
Don't try to make a game for others. Make a game that YOU want to make and that YOU would enjoy playing. After all, how can you expect others to enjoy your game, if you don't enjoy it yourself?
Just look at Dark silver if you want to know how bad it can be to try and please your audience too much. Big brother was one of the most popular games ever on this site, but Dark silver began to give in to fan requests too often and soon his game started to evolve into something he never wanted and wasn't passionate about. He took the first excuse handed to him (patreon's new TOS) and dropped the game.
Now Dark Silver is making a new game, which HE seems passionate about, but his former fans are pissed because he stopped working on Big brother. Because his fans are pissed at him, he is angry at them and never listens to any of their complaints anymore, even when they bring up things that NEEDS to be addressed, just because he doesn't want them to control him anymore.
So in short, he tried to please his fanbase, by making them happy instead of himself, and now we are at a point where both he and his fans are more angry and miserable than ever. Don't make the same mistake. Just make a game that you think would be fun, and then people will come.