Wow that's so cool you loved it !

And no it is not procedural, the map is 7x7 and for each tile i spawn a door between 2 tiles in a random direction when this direction is not already occupied, and this process is repeated for each tile. But there are some patterns that make some areas impossible to reach, so some tiles don't spawn one but 2 doors in a row to prevent that issue. Finally the last tile might not be able to spawn doors because every direction is occupied, so it's a particular case. 

I thought about detailing all my work in a devlog or a video i don't really know, what do you think about it ?

Anyway, thanks a lot for playing :D