I really liked the third level having this limited view - it started to fit the themes you spoke of. If you would've wanted to take it further it would've been interesting to potentially amp up that mood with audio and visual effects - maybe the screen shakes or the ball makes a pained sound if you hit a wall too hard.
I'd love to know how the concepting process went with ChatGPT - did you find your idea on the first try or did you have to workshop it with the AI somewhat? And did you manage to incorporate all the features you wanted?