Overall the game feels really good. I really like the visuals with the music and the mix between 2D and 3D is really well done. My only complains are as others have said the camera movement and some minor details in mechanics:
Maybe the dash could have some cooldown, at least with every enemy except the final boss I could spam dash to the left while shooting in circles avoiding every attack.
Regarding the final boss, I feel like it's such a big power spike in difficulty compared to the other bosses that were in my opinion way to easy, at least for me.
Exploring definetly was the best part of the game. I feel that I could play it for hours with a bigger map and some kind of minimap to know where I am.