I'm a fan of turn based tactical games, so thank you for making this one! You should include the tag "tactical" to reach more people.
It would be good to include a text description of the resistances/vulnerabilities of the enemy.
The combat system design is interesting. I'm not sure about the requirement to have 3 unique cards - are the cards which are drawn from the hand random? If that is the case then it would not be possible to guarantee 3 of a kind, would it?
Why include an Exit button?! :D I guess it's the pygame framework but it's irrelevant for a web game.
I hope you continue working on this after the jam - there is potential here.