Got a 140 win streak with the Ungoy; apparently the game ends after beating round 141, as I couldn't hit "next" after doing the bonus wheel, and I had to refresh my browser. Also my Ungoy's special attack was one-hit killing bosses that had well over 1000 HP, even though the attack was only doing ~950 damage.
Game was WAY too easy. (still amusing, though) Don't bother going for the tedious 140 win streak unless you're super bored and have an hour to kill. I'd suggest either adding more layers of strategy and more enemies, OR speed up the gameplay by doing away with the victory screen and the bonus wheel and just doing a rapid-fire series of rounds until your character dies.