Thanks for the very helpful feedback! Yes, I've noticed that most players aren't getting quite as far as the main challenging gameplay element which is active echolocation (but this is a reasonable way in).
You've hit my nightmare bug - sorry about that! Particularly before you get the sonar there's not much you can do if the (extremely basic) pathfinding sends you into a wall. If you're curious - sounds like you got stuck somewhere in this map.