Quite a charming game aesthetically and it's quite fun as well, though I am a bit confused on what the numbers on the cards actually mean, my best guess is it's the "strength" of the card, how much damage it will do (or in the case of shields protect from), but, perhaps unimplemented mana? A bit more of an explanation on the mechanics would not go unappreciated. All in all pretty enjoyable, nice work!