I really appreciate that you took your time and write this comment. The game is kinda overextending compared to 4 days so obviously I have missed many things. I thought some things to be obvious but when my friends played, most of them got stuck in the first room. So you are not alone! But I will fix it, make it more reasonable to figure it out.
I had many ideas about the prisoner as well. But all I could do was a simple knocking. I have just started to learn rigging, next time it might to do crazy things.
Thanks again for the comment. I would love to build and expand the game, glad you like it!