This is full of amazing ideas! I do feel it's a little unintelligible at the moment, and that more testing could make it actually GREAT.
Even Outer Wilds had to make clues super straightforward for testers to pick up on the relevant information. I feel we as players are often left feeling that game was much more cryptic than it actually is.
I have to admit, the actual solution took me like 20 minutes to execute after I gave up and grabbed the guide (but I was too engaged not to see the ending!). I kept messing it up and wondering how on Earth I'd have done it without step by step instructions.
It's true that I could've experimented more. Now that I know how to use the elevator, I definitely feel "why didn't I try that?" But most other things (shadow/light, glitch) were more on the side of "I wouldn't have noticed that in a million years".
Just spit-balling here but maybe limiting the amount of simultaneous tabs would help. It feels too overwhelming to be allowed to open as many as I want when I have no clue how many I need to test how they interact with each other. Of course you can't prevent new tabs, but I'm sure there's a way to comunicate a limit.