Really cool concept! I love the idea of these anti-vampire survivor type games! This one looked really cool and I like the ideas you were going for.
I think balance was a bit off though. Like EUGENIASIOCH said below, I didn't touch the hero till maybe 10 minutes into the game after I had leveled the left super high to make money and then the right to be tanky, they finally got a few hits in one round, but after that they were getting demolished again. Also, I know we were adding troops to the field, but them spawning outside the screen is a bit disappointing since most just die off out there! In the beginning I didn't know what was happening because my units would barely get to the screen.
Besides that though I really like the idea of the game, and it graphics/sound were pretty nice too. Overall good job on this!!