Well, you are definitely right about there's no proper ending for the game due to poor time management... :') However! "The door" can definitely open. In hindsight, I definitely made the the third hidden item exceptionally tedious to get since I've noticed no one mentions what's behind it.
Also, I am happy that you liked the writing! Fan fics are not my thing so I'm quite surprised! Thanks a lot for taking the time to playing Fiction Raid!