There is curgently no way to go back to previous rooms, but I wanna add it once the jam is over as well as better backgrounds for the first room
I thought of that sadly like an hour before the submission period was over, so I couldn't add it.
And yes it's the letters in the wall that spell out Door. I tried to make it more like walls with the floorboards on the bottom and the yellow parts on the left/right of adjacent walls.
Thank you, the bookcase was my favourite as well with all the stuff added, it was hard to stop putting more in xD