Thanks so much for giving my game a go!! I can totally make the difficulty adjustable! I'll keep it simple for now with a single slider that tunes stuff like how much higher enemy health gets as the rounds go on and the speed multiplier increasing much faster. The Fridge is getting nerfed as we speak!! I also heard from others it's OP so that blue guy is gonna get toned down so things feel more balanced.
I got new enemies planned so you won't always be fending off hoards of pink and blue Hungrys, I'm thinking about focusing more on introducing bigger, tougher, slow moving enemies vs. just throwing a bazillion little guys and calling it a day for every round. The game auto-generates rounds after 10 so I'm gonna handcraft more of them that introduce new enemies, offers more unique combos of enemies, etc.
I've still been a bit stuck on how I can make the late game after round 30-35 more exciting, but I think I'll figure out something after talking with more fellow devs and other players, thanks for the great feedback!!
Glad you enjoyed the game!!