Fun game. Got a few ranks of the area increase & the knockback, one each of the poison & lightning, and some other stuff. Autoclicker at a 0.15 interval. Crowds of trolls just melt. Made it up to 45k before enough had slipped through.
Could you add a slider or option for the screen shake? With even a couple of the giants spawned, my eyes started to hurt a bit. 7 or 8 on the edges of the screen (knockback) makes it kinda excessive. Or maybe make them faster, or add another speedy enemy, if they're meant to be the killwave.