Thank you for the feedback!
I have just created a version without the mouse following the camera: https://arturaugusto.github.io/Faraday-cage-Rampage/no_mouse_cam
If you wanna hack to see a generated high level proceed as follow:
* Press F12 to open the console
* Reload the page
* For example, to jump to level 10, write on console: level=10
* Press any key on the page to play