Wow, I love this game. It is one of the best of the Jam. The characters, animation, and particles are incredible. The gameplay is funny and addicting, you have to be aware of so many things. And I love the fact it is so simple. And it fits the topic perfectly. Almost perfect IMO. So sad it does not have that much attention.
Maybe you should add some boosts between rounds so difficulty doesn't grow so exponentially (like a higher fire rate or so). Also, some mechanics like a wall jump and the dash are not so useful when playing
But it was an amazing short experience. Keep it up!