This "bullet hell" made me sweat a little. Made it to the wave 14 and yellow teleporting enemies.
At first, I didn't realise how to shoot, so I ran in a circle until I had 14 hp left +)
It would be nice to add a simple note inside of the game about controls. I thought "hold space" do something. But in the end, it was just a feature to start a game.
Yet, very nice game. Good thing it has pause. Thank you for it :)