I thinks it's cool to have these written walkthroughs, but can I ask why there's only answers to codes or puzzles as opposed to an explanation of how they were actually solved? For exsmple, in Busy Airport, the code is given for getting the last instrument (& even a video of what happens after it's input correctly) yet nothing is mentioned about how you got the answer. (I'm guessing one has to follow the wires, though I'm screwed as I can't see them to do so.)
