I like the idea of this game, I've unlocked all the cards, but it is just a hard game. I think I've completed less than half of the scenarios. My success seems very dependent on the randomness of the events, the upgrades, and the cards I get. If I play well, and the cards work I win. It is just that more often than not the cards do not work out for me. So my impression is that I have a 20% win ratio. If it were just a little easier or maybe I played better I would play and enjoy this game more.
Any hints for better play?