Hello! The button to retry the section after dying to monsters has been fixed. Additionally, the door that previously returned you to the beginning of the scene now correctly brings you to the right scene. ^^ I apologize for the inconvenience this caused.
I've also added the scene under the scene section in the menu on the second page, so you can immediately return to it.
Regarding the HP bug that causes the player to reset at low health, I have not yet been able to reproduce the issue or determine the cause. I will continue investigating it. Thank you sincerely for reporting this, and I apologize for any trouble it has caused.