Wow, this was interesting. Absolutely loved the use of stereo sound and general idea. It think it would have been helpful to have a bit more experience using the crane and experiencing the sounds before it going dark. I think it also would have been nice if the successful grab sound was a bit more obvious, or if the sound of the crane moving when you were holding an object was different (again, maybe I just needed to familiarize myself with it more) because as I working my way through it I kept questioning whether I had actually grabbed a box or not. I kept dropping them to try to get an idea.
Overall, I think a little more hinting as to the state of things, why it was dark, and what exactly you’re doing would have been nice, but I did eventually complete it successfully! Nice job, and kudos for trying such a unique idea!