Not sure if this is would be allowed, but if I could ever make suggestion, it would be 4 things:
1: We need more jiggle physics of any physics for the booty on these girls.
2: We need an actual super thicc chubby girl, like some we seen on Rule 34, similar to Changbae's Adelia, and her big booty, which brings me to my third suggestion.
3: Shortstacks. Agreed, it's not everyone's cup of tea, but despite that, it is still some people's niche, and therefore, it would be a welcome addition to this godsend of a game.
4: Spanks Marks. it always felt weird to me that the game didn't have that, as much as I spank them. Yes, at this point, I sound hungry for big asses, I admit, but honestly, aside from the Chubby Woman, none possess this quality. I've always been an ass man, and considering most of Japan's focus is on boobs, I feel like big booties in this game are in short supply.
But on a more gameplay-wise note, if I were to add an extra suggestion, it would be that this game deserves a slave mod, or something akin to it. What it would entail is if you've fucked a girl before, you could have a special dialogue with said woman if she appears the next time, and then more sex, and if you meet her, enough, and fill a new "special gauge" up, you can have her as a slave, or concubine, where you can call her in after you've done your shift for sex, or sex during your days off, in which her whole dialogue changes during you fill up that gauge, and after you max it out.
is it alot of work? Of course, but if someone were to think about making a new mod, or the creators of this masterpiece were to make a second installment, I think this should be a vital implementation.