I've played a few time to your game, and the last one ended by :
Error cards.lua:152: attempt to perform arithmetic on global 'insideman' (a nil value)
Traceback cards.lua:152: in function 'nobility' battle.lua:130: in function 'mousePressed' main.lua:28: in function <main.lua:25>
[C]: in function 'xpcall'
The concept was kinda opaque as someone already said : I'm not even sure of what I'm doing after having played it a few times.
Maybe a little bit more of informations and explanations about the card's power and usefulness would have been very helpful for us to understand how to play and finish the game, because I didn't quite well understood the explanations of the differents cards in game.