Brilliant, loved it. Clearly very well thought out and suitably interesting to not feel dull despite not actually interacting with that many objects. I particularly liked the final move the player had to do, took me a few extra seconds to work out why the funnels weren't quite lining up. The only suggestion I can offer is to perhaps improve visibility somehow, maybe exchange the grating for a laser grid so the player can see through it slightly better.

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