We appreciate the feedback, Titania! Very thorough and specific. We are currently working on a new build to address these issues.
One thing you mentioned was that you didn't die when health reached zero. This ended up being intentional, deaths being cut due to the time crunch. Instead of death, you just slow down so you can keep exploring without a restart.
So please look forward to the new version! We will reply to your message again to notify you when it's up. You can expect fixed movement, doors, fixed lights, clearer gameplay, and lore docs!