Thank you yes I'm very open to ideas. One of my problems picking this genre is that I have never actually played any of these card games before - I just thought it would look cool! Now that the jam is over and I can take my time with the game I think I want to spend some time playing more card games and seeing how the mechanic works.
I definitely want there to be some element of strategy, even if it's fairly light. I didn't really want it to be just a click fest through the resident stories and then the game is over which is what it would be if I just kind of finished what I had now.
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I haven't played many card games either. Sometimes it does help to play lots of games in a particular genre, mainly to get a feel for how they're built and balanced, and the mechanics they use. However, it sometimes helps not to delve too much, because it generally makes your own concept more unique. In your case, you've already grabbed yourself a pretty unique concept by working 'blind', now you can get some inspiration from elsewhere to build on it :)
Best of luck with it!