You awake in a dark room with a vague memory of needing to do something. In front of you is a large machine, but you cannot find a manual. You have a sense that you need to turn all the red lights green. A sense of unease tells you to hurry.
Feedback
I always liked games where you have to figure out yourself everything (like The Witness).
At first I couldn't figure out how to use knobs. I was trying to turn them with mouse, while it was required to do left&right. That's why I had problem with sinus level.
I like that you could skip the level by clicking next.
I couldn't figure out the last one. At first I thought that solution will be 404 :). In the end I think number was connected with the sound (although I'd pick lower sound with lower number not higher - so I'm not sure about that).
Code is nicely split into components. It's written well so it begs to be expanded with new rules and ideas :).
Anyway - god job with this one. One of my favourites.
I like the game idea; figuring out how things work and how to interact with the elements to solve the puzzle. The visual style fits really well with the mysterious atmosphere/ambiance with nice background music and good level design! Just a minor improvement, would be nice to store the game progress so any player can easily select or retry the last unsolved levels.