Well, where do I start? I've been playing for about 3 hours and I think I did well. There are a few things I'd like to recommend, so I'll put them in a list, okay?
1- I'd like to add day and night periods, giving more chances for certain types of Mons in certain periods, like Cinderece during the day and Zoroark at night.
2- Better interaction between the Mons themselves, like sometimes seeing them making out. I think this idea is interesting.
3- Increase the possibilities of sexual activity because the two genders are the same (I admit I loved the animations, they were very fluid), but when you see one, you've already seen the other, in addition to alternative versions like Vulpix and Alola Vulpix, which are the same thing, so there's kind of no surprise.
4- It's a continuation of 3, but I think it's an interesting idea to give them the option of fucking the players instead of just fucking them, giving them more, along with a greater variety of options during the sexual act. 5- depending on how much we do with a Mon, it can evolve and add a secret option that if the Mon's bar is full in the act, it activates a cutscene of him evolving while fucking