Great design and very cool mechanics. I like the ticking clock and effects of heat. I'm assuming the ancient myth is gremlins, right? They're a fun way to raise the stakes.
Presentation is good but it's dense and I was lost a couple of times. Since the module conditions key and map is on a different page than the descriptions, I was having to flip back and forth to try to piece things together. I also forgot that the numbers in diamonds were for module conditions and not for the map locations. Maybe it would help if they were a different color?
Does the blue Special Rules header mean that the rest of the headers on that panel are part of it? Maybe Module Conditions and Installing Cables etc could be smaller subheaders to make that clearer.
It's jam-packed with gameplay. I think this would be a blast to run.