Interface usability is awful. Forfeit is in the same position as the button to enter a fight, and you lose 50% of your gold which is ridiculous. Then when you fight you have to move to click continue, then back up to attack if you don't beat them in the first round. Then all the way back up to the arena button because there's no fight again button. Balance is a little weird, but it's nice to be able to select the enemy level. Cool concept, but pretty repetitive. Doesn't take much effort to win. Also several bugs; for example, when equipping a sword your character shows the shield of the same level even if you don't have it.