Very fun game, great idea and good execution! I love the visuals and the sounds as well. Very clean nice sounds.
The only things I've realized are, the same as other people, the hitbox of the players feels a bit big.
And the other thing I realized is that both in wave 4 and 5 I had it happen, that an enemy spawned right on top of me and I instantly died, which was unfortunate.
But otherwise amazing job!