This is turning out extremely impressive, Monsieur OUXX. The walkthrough you're writing is a pleasure to read, and it goes a lot more in-depth than I had hoped for. Very anxious to see how you will finish it. Once it's finished, perhaps we can make it into a .pdf with little known details, screengrabs and a map?
Yep, you can do whatever suits you with it!
Just a small recommendation though: if you add details about the game's background (what's happening in Steve's head, what is the meaning of each room, etc.), I would suggest doing so alongside
the down-to-earth walkthrough (e.g. in a separate text column), and not
directly interleave the two texts. Otherwise it might make the reading more difficult for someone who is stuck and wants to get unstuck without spoiling. Feel free to do it that, or not. You're the boss.
PS: do you read your Personal Messages of the AGS forum?
PPS: I finally finished it, but my score got ruined from having to start over, after I hit the "De Sade" bug. I didn't bother clicking on everything again like the previous time. So I got only 361. Having said that, I just checked my faulty saved game and I wasn't much higher. I have no idea how n0p got 806 points!!!