very original idea, definitely thinking outside the box! But I think purely relying on audio is a limiting design. It's impossible to play if you're muted, hard of hearing, or even just have crappy speakers without good stereo L/R channels. I couldn't really tell where the crane was so I got frustrated and didn't want to progress.
The intro was fantastic though! Excellent sound design, storytelling and building atmosphere. The accident was really well done and immersive. I wish the game had been a bit more accessible to keep playing! Imagine a red emergency light that blinks on the crane every 3-5 seconds. So you are very limited by sight, but the player can still know exactly where they are at any time. And maybe the crane could be a little faster.