I don't really have anything to say that other comments didn't say, but... I really had a ton of fun with your game! Great music, great visuals, great feedback, simple but enjoyable upgrade system... each element fits and goes well with the others, which just makes it extremely fun to move this slime king around and destroy all those little knights. For me it started lagging a bit after 4 minutes, then came back to normal. Was still running completely fine over 7 mintues in... and yeah same as others, even by standing perfectly still I was just too OP to die lol. (side note: I still haven't played Vampire Survivors, but thanks to your game I think I understand the hype...)
Overall: tons of fun, feels pretty polished, fits the theme, so greak work!