Overall the game was fun but quite difficult. I also felt that some of the obstacles didn't match the area they affected meaning dying sometimes felt unfair.
The idea is that you begin as a powerful high level adventurer at the end of the difficult dungeon, once you defeat the boss you are struck with a curse reducing your level. This results in less mana for you to use and less spells. You literally rewind through earlier levels as you play through a dungeon in reverse.
I just used a class for each card effect which I attached to an empty game object, then when I wanted to play the card i just instantiated the relevant game object. I'm sure that there is a better way to do it though.
