Very good game, for the innovation of the game's mechanics I think it's novel. the boss attacks give me a strong sense of freshness during the fights and don't make me feel bored. I will be looking forward to see what the next stage of the boss will be like.
One suggestion would be to add HP or a noticeable screen blink when HP is low. Because there are times when I don't know how much HP I have left before I die.
If you don't mind you can try our game and advise on a professional nature!