While I admit is is pretty difficult for me, a fully sighted person, to quite get the hang of this, I love the idea if you could nail down the audio cues a bit more. I can't speak for someone more used to using audio to navigate, but for me I just couldn't figure out how to avoid the car door at all! HOWEVER- there is a brilliance and elegance to this. It's realistic. If I genuinely lost my sight today, I would be HOPELESS on the sidewalk tomorrow, for sure. :)
Especially knowing this is your first game, I think it's good! But truly, there's good potential here.