Very punishing difficulty.
First boss usually starts with it's projectile volley that's close to impossible to dodge. And even when you do, he's most probably already in your face, and trying to make yours look like his.
I tried circle strafing the arena, but got caught in all the littered bosses, and there is no window for error there, so I got my health slowly chipped away.
The I tried the same tactic, but only looking back to shoot, and generally looking forward and dodging the obstacles. That also didn't work. Got chipped down by the projectile attacks and every time I looked back, he was a different distance away from me, sometimes the other end of the arena, at others, right in my face.
The controls are fine, although dashing with the E key is not really comfortable, since I could use my pinky finger to tap shift or control, but with E I need to lift my index finger from D.
I like the visuals that your going for, and the game seems interesting, but I bounced off pretty quick because of the unforgiving difficulty.