I tried to play the game but as you said, it is very bugged. Regardless, I tried to find a game in there and what you have seems interesting. The swapping of your cards with the opponents is a pretty cool mechanic. If I were able to play cards, I would have damaged all my creatures so that when they returned to the computer, they would be dead 😅
Anyway, nice try! Keep participating in Jams and you will learn how to limit the features you want to implement in your game and you will become faster at implementing the core features your game needs. Congratulations on getting something working up!