I've created, an accumulating bodywriting system. Each time you ejaculate inside, a tally mark or some writing gets added. After pondering as to whether I should have sound effects even without voice acting, I've decided sound effects are the way to go. Complete silence was too awkward. The man's skin color is randomly selected each time he pulls out and another man replaces him. This gives the illusion of a train being run. I have to do the anal animations, some cum animations for pulling out and the left side of the game screen is done. Then I can put all my time and effort into developing the right side for face animations, and the girl's head swapping mechanic. I also want to add a pregnancy mechanic. This is all I'll have in the base game. Probably 3 characters to choose from too. Then I'll let people commission more characters to add in, and slowly figure out what other mechanics I'd wanna add...