I really like the concept as a whole, and your room descriptions are great. I actually think the map does a disservice to the adventure, because the mental image evoked by your descriptions often clashed with the map. I'm not sure the map is necessary, and removing it would give you room to put the engravings directly in the room descriptions where they are found.
Design-wise I think there are too many colors, especially for the text. I had to zoom in more than usual to read it.
I am confused by the objective to restore communications with MFBTC, what is MFBTC? I can't find any other use of the acronym and can't find anything that it is obviously standing for.
I think it would also help the Warden if there was a little more guidance on what happens if the crew doesn't disturb the black veins and disrupt the function. If I understand correctly, the Null Protocol won't be activated, does that mean the crew can simply walk out relatively safely? Seems too easy...