Enjoyed the bullet hell. I think the best points are that controlling the player is precise and satisfying and the progression tree offers meaningful decisions and whatever you pick, it feels very rewarding. It also feels like a solid package. Bullet hell patterns are also well balanced. On the other side, some bosses, starting from the fourth one, attack so much in a straight line that it's very hard to sneak some direct hits into them, making some fights feel very long.
Good job!