I think this is a very interesting project. I love playing not only with the conceptual perspective of the game but also the literal perspective by making the player almost entirely blind and forcing them to use echolocation. I think the echolocation effect might be a little challenging right now and might be more effective if it showed the world for a little longer and faded out.
The way you move around seems weird to me but that might just be because of the echolocation but it felt like I was on a hill but that I was perpendicular to the vertical axis and not the ground which is unusual especially for a tiny creature like a shrew.