Solid base for a good game. I like the character design and art style, and while the actual gameplay is bare bones what is there is already pretty good.
QOL changes, maybe including some instructions? I didn't understand how the Reduction card worked, I thought it gave you 2 action points so I was hoarding them in my hand for no reason. Other then that some menus and simple settings for volume would be nice. I'd also like one extra stage in the sex scenes before the actual sex so I can look at the art by itself, but that might just be me lol.
As for what I personally would like to see in this game, I think it'd be fun if as the girls hp dropped their clothes became more tattered and revealing, becoming naked once they hit 0. You can use that to tease the futa character at the end as well, that way people aren't as blindsided by it.
Great start, solid foundation. I look forward to seeing where this goes!!