Real good, especially considering the wild card limitation you guys used, and in a way the fact of closing your eyes and finding your surroundings while paying close attention to sound makes it kinda relaxing.
One small issue still i think is that since there's no visuals at all i found it hard to know where you're facing with the movement method you used, i feel what could help would be to have a sort of "double movement" system where you'd have the arrow keys as guarantied alwys moving in the same direction, and WASD or other to just turn yourself around when not moving so that you can only reorient yourself to examine your surroundings, just a thought, the game already has good qualities as is nontheless ^^
Also like how you took some time to have a small tutorial to ease the player into the experience.
Good job to the team :)