That was great, everything was clearly labelled and logical, suitably complex and quite satisfying to solve. The only improvement I can suggest is to fix the small gap between the fizzler and the glass in the speed gel room. At the moment it's possible for the player to get the box out without using the speed gel at all.

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

Das Level ist gut, aber wenn man im Raum mit dem Rückstoßgel ist und man in das loch fällt kommt man nicht mehr raus.