Other commenters mentioned this, but on-hit feedback would be really helpful with the first boss. With the second fight, the dust particles when hitting the boss after their laser spin attack was a nice contrast! In that case the hitbox could've used that extra feedback, I wasn't sure whether I was dealing damage to the hands when they were braced against the stage
The art definitely stands out in this, the bosses are really flavorful and have excellent silhouettes. The contrast in stage design was another highlight, having the change in how the camera behaves depending on the boss definitely helped the fight not feel stale. And the range of attacks was really solid too!