Yeah, since we started from scratch on this, we were scrambling to get everything functioning on time to submit. So UI/UX is definitely the weakest part of the game. If we keep building it, we will add more animations to show effects and such. We didn't even have card draw and discard animations until like 48 hours before the jam ended.
There were 3 of us, and one of the guys on our team is an artist. I believe he had some of the art already started for just practice/fun, but yeah, he did almost all the art himself. I am the programmer and was able to help him a bit on the characters with my very limited skills. That is why there is more variation there, 2 of us working on it.
We also just threw a bunch of cards together to try, not a lot of thought went into that side of it. This was almost more of a technical experiment to prove we could build a card game. All 3 team members work full time on jobs that have nothing to do with making games and have families and other obligations, so to be honest we are all just relieved it is playable at all.