Oh I completely understand. I actually spoke to some people about these issues, but some of the fixes are a bit more difficult! I'm guessing with the forgetting beeping you suffered the same fate as testers where your brain started to filter out the different noises because they were so constant in some levels. Happened to me too once I noticed! Not sure how to fix that one, so I probably need to play other Audio games and figure it out. Other audio games probably have more in between navigation sections and give peoples ears a break, so it might be as simple as that.
Audio games are a whole nother beast I'm afraid and this is me learning. I'm glad you still had a fun time despite the difficulties!