Love the game, but I gotta say it's kind of unbalanced.
Totally understandable for a free online game, done by a single person (please don't take it wrong), but the Epic or even legendary cards can be way worse than the Common, and some heroes are invincible while others are just in the way.
edit: (Holy moly, just read this was for the game jam and done in 5 days; mighty impressive, big kudos)
I got through all 20 round untouched with the poisoner alone in 10 minutes, hitting by 300, mostly with common or rare cards, but the Golem thing actually gets in the way, taking valuable mana, murking the pool, and making attacks that take waaay too long to proct. Also, the team "X team mate also attacks" cards consume the mana for that attack if it's there, actually taking away flexibility and choices.
All around, I played for waaaay too long and broke with all characters at least once, but definitely the golem is the weakest, and the succubus the second weakest (though she can break with the +2 stun damage and some ally to kill the first round of enemies so that you are facing only stun locked monsters)
