You made a game, so be proud of that. After playing a bit, it wasn't really my cup of tea. here's some feedback if you like.
I didn't realize the entrance's right side was a path at first. The floor color blended with the walls a little much. I didn't bother with the echolocation, it didn't seem worth it to me. I'd have liked just a bit more vision, or maybe zoom out just for the echolocation?