I really like the idea, reminds me of Inscryption, which I think you put in your Inspirations in GDD.
The UI side of things could use a little work, I don’t really like that you have a bajillion cards in your deck, and that there’s no way to fully inspect the cards from the hand.
I also managed to break the game because death event can be triggered multiple times and spawns multiple restart menus. But this happens.
Overall, good job.