Hello,
No presumptuous at all. Glad you liked the game.
Actually it is a good idea. I have also been thinking about the random messages scattered around the dungeon left by the previous adventurers. The messages are going to give some hits about the game world, the backstory and the thoughts of the previous adventurers. And even some foreshadowing before the reveal of the secret ending.
Since the game takes place in a post-apocalyptic world, I was thinking about some sort of graffitis painted on the walls rather than pieces of paper with writing.