I love the concept! You really have to concentrate for this one, I still think I'm just getting lucky solving the levels.
I like the reverb on the sound effects, it feels like you are in the void. One thing I noticed was that the hit boxes of some nodes sometimes didn't cover the full thing, so Initially it had a cross indicating you couldn't connect it there, but if you moved slightly lower it allowed you too. This could just be a resolution issue from WebGL though.