Great game dynamics! I also really liked the visual style. I made it to wave 11 and was hoping to encounter the dungeon boss at the end, but unfortunately didn’t :( Still, I really enjoyed the game; it’s a fantastic and high-quality piece of work!
I'm definitively going to try to add a mini-boss at some point in an updated version, every 5 to 10 waves, something like that, to spice things up a bit :)