Nice, clear organization, easy to read. Good images – map is clear, extra images work well to set tone. Good adventure, will work even if players have seen the details. (They'll know where the serum likely is, but "in the lab" is not a stretch.)
The hook is a little weak--it's clear there's value in exploring/salvaging, but it's not clear why any particular group of PCs would be involved. (Or why they'd stick around once they figure out the dangers.)I love the dog as an antagonist, though. Like that it can be as tough or minor as wanted; this could work as either a gritty space adventure or a comedy romp, if the group wants to push it that direction.