Thanks for the feedback, guys.
As I mentioned in my first post, this istnot supposed to be a project to release or acutally sell. It is just for personal pleasure. So no issues with licensing here.
Also this thread was not supposed to already show what exactly needs to be done (I’m pretty sure I couldnt write down all the tasks even if I wanted to - gonna be a try and error thing for me).
It was just about finding out if there is someone else out there, who likes the game as much as me and wants to participate in recreating a level from this game.
If there is no one at all and I have to do this by myself, there is no need to spam this thread with multiple tasks, right?! 
Maybe it would be a first step just to recreate the buildings and lights and everything and totally exclude the guards and all the actual game functionalities in the first place.
And then we’ll see where this whole thing will go. So, if there is anybody out there willing to contribute, feel free to contact me.