Thanks for the feedback! The game definitely needs ui and general improvements for clarity, these areas were a bit rushed because of time. As well as showing how many cards enemies have I want to show the health and who used which cards in the recently used cards box. I do want to keep if secret which cards an enemy will use though as this is more in line with the experience of playing Whist. There definitely does need to be a way of making it more strategic though as it does sometimes feel like blind luck when you choose a card. You do have less cards in the later floors too, I may add difficulty settings in the future so you can start with fewer cards, gives me the chance to add more unlocks too...
Thanks for playing!