Thank you so much for this extensive critique.
I am very happy to know that my design decisions are working as I planned. And the fact that there are things that I can improve.
Yes, I agree that the music is quite repetitive, unfortunately this area is one of my main weaknesses so far. I don't know how to compose something long, if I managed to make something short, I'm already happy.
The three spinning rings are really added to complicate the good ending. Previously, there was only one ring in the center and it was very easy. But yes, if I could expand this idea further that would be great. Change patterns between chapters, conditions, etc. This could go well with the narrative.
The loss of life came as a surprise to me. I did it without thinking. And the more I think about it, the more it seems like a good idea. Now I remember how I used the loss of life in the game as a tool to achieve the goal. Change location or attack aggressively.
And yes, "spew bullets into the room" I can't argue with that. In the early stages of design, I thought about how I would make enemies. Will they shoot at the player or will they shoot all over the room. And I had no idea that the best solution is both. If I created several types of enemies, then more interesting situations could be made. At the end of the game, I tried all the interesting ways to use enemies. And the use of new enemies could only make the game better.
And the last chapter. I wanted to reflect the chaos before the end. Perhaps I really overdid it and made the last chapter not as interesting as I wanted.
And the last thing about chees. I know about it. There are special safe places. At first I thought how to get rid of them all. But then I started to worry less about it. If the player finds chees let him use it. The game is sometimes quite difficult.
Thanks for playing :)