I got past the first door and reached the switch. I didn't understand what was missing and got stuck there, never going past the door with the ramp. I stepped everywhere I saw I could step.
This sounds dumb saying but it's also hard to navigate because of how dark it is. Not sure if some minimal ambient light could help or something else. Essentially, it feels more like we're in a pin-hole and can only see in that single spot of light source instead of "I have a flashlight and I can navigate around, even though I'm not entirely certain what's around me because it's dark"
The input/tutorial page also felt confusing, as in "wow this seems a lot to remember" and while playing I then understood what those things meant.
Tested with firefox