Interesting and awesome game concept. I found it a little bit too dark. I guess the knocking background sound helps you somehow to find the right path. You definetly deserved some stars for this nice game.
Thank you for the feedback. After the initial submission we actually thought of re-adapting it to be a fully "blind-friendly" game given most of it's core gameplay is based on auditive hints (that's why you might have found it somewhat dark).