I really took my time playing this one. It was pretty enjoyable trying to figure out what to do next, frequently riding very close to a loss, and sometimes having a satisfying set of cards to play together over one or two turns.
Like others say, attack cards are really sparse, and how often they come up can sometimes make the rounds fast and trivial or very slow and hopeless. Still, for a jam game, this was pretty well balanced and I wouldn't mind giving it some more tries to get past stage 5.