I really like the art style, I think it works really well.
The game is very good, what you have right now is well polished. I'd just add some gesture animations and not much else, with that, this version would be perfect.
I'd like to see some twists on the mechanicas in the future, perhaps learn something from each date and use it as deck building. Or a strength/weakness system could be interesting with this theme.
Great job and keep on developing! Good luck!