That was pretty good, well designed and used some excellent mechanics. Unfortunately, I don't feel it was that satisfying to solve, mostly because, beyond the first ball mechanism, I never really interacted with much, just the lasers that direct the funnels. The ball mechanism was good, the player had to think about what they did but the rest of the room felt a bit lacking despite looking really busy and involving.
As an aside, most anaesthetics are administered intravenously or through inhalation, it's pretty tricky to lace cake with a needle without anyone noticing. Invasive brain-machine interfaces are typically used to support a damaged sensory input thanks to the high level of neuroplasticity displayed by the various sensory cortices rather than to simulate realities.

I've got a little collection of chambers going and I'm always interested in feedback. I'd be grateful if you'd have a look:
Elementary