Hey cool game! Played it on gx. I really like the idea of these reverse survival like games. Nice way to balance with units also giving the hero benefits. I won the first time with just lots of bees, pigs, and big goblins. I did find it amusing that the Golbin Archers didn't actually shoot but just chased the player lol.
Second play it was a little more of a slog since I picked big minions and it took a while for them to come out, but the hero was able to wipe them out pretty easily anyway. Also with them not coming out as quickly made the rounds go much longer and it seemed the hero was able to heal throughout the round? Also minor, but the menu music seemed a little jarring to me. The game music was good though!!
Overall though really cool game and I could see an expanded more balanced version being even more fun to play! Great work!!