the intention is noble, the idea of the game is excellent, but it simply doesn't work, I spent hours trying to mate with some creature whose heart is in front of the video bar, I pressed (y) several times and got nothing, I died several times Sometimes, I had a corrupt save and even after starting again, it didn't work, I wouldn't even be able to complete the first quest, as sexual acts in this game simply don't happen, and clearly the first mission is introductory, but it doesn't work, I believe the scope of your project is too big for you to achieve alone.
you could simplify the system for having sex a little, it should be easier to reproduce, it should be the focus of the A.I. of the creature.
Making the player masturbate in the wind is no fun.
edit: I added your game to the Steam wishlist, I'll be waiting for your project to evolve further, or at least for the basics to work as they should. I'm rooting for you, don't give up, the idea is really promising. Hugs