Not bad, but...
Where you high when you made that walkthrough? After the point where I put in the 5023 code, it says: "Go up the ladder". But, the only place I can go is DOWN. I suppose that was a typo. Next, the walkthrough says: "Examine the box, get the upstairs key." But when I go down, I see no box. I see three doors and a Red/Blue light. Now the obvious riddle here is that you must turn both lights on to open the middle door. The door on the right is easy to open by reflecting the blue laser, however I have no idea what to do in the room on the left. It says that the "board is loosely attached." I've tried using every item on it, but nothing works. And your walkthrough doesnt even seem to mention these rooms, how odd.
Mabye you should smoke weed after you've made your walkthrough, not during.