Thanks for your feedback, and thank you for taking the time to play the game!
The biggest challenge was definitely making the player rotate together with the platforms. I spent quite a bit of time on that, especially since I wanted to use the physics system and rigidbodies. Regarding the walls, they actually have the correct thickness. I modeled the concentric platforms that way, but the materials and shaders may create some visual distortion, making them appear thinner or different than they really are.
I built this game over the last two days and mainly used it as an opportunity to test some scripts and shaders that I created myself. The goal was to turn them into a reusable package that I can use as a starting point for future game jam or quick prototype projects. Because I was in a rush to finish a playable demo before the deadline, I merged my existing first-person and third-person controller scripts. It worked well enough during testing, but I overlooked the mouse sensitivity settings in the web build, particularly the horizontal camera rotation.
You're absolutely right that this is only a demo showcasing a few mechanics. I do plan to revisit the project in the future and expand it into something more complete.
Thanks again for your detailed feedback—I really appreciate it!