Really, really cool idea! I loved the diegetic interface, though I think the camera display could be a bit bigger.
I also ran into a bug: the game crashed twice after I completed the second stage, and once before starting the fifth stage (I think?). I'm not sure if it'll help, but I'll attach a screenshot of the error that appeared in the browser console. Oh, by the way, I played the game on Firefox.
Still, I loved the creativity! Nice job!