This is supposed to be near future, so I would expect that there would at least be a lunar colony established. So what happened to them? They are isolated enough that the triffids and fungus can’t reach them, and given how fast things deteriorated between the outbreak of the blob and total collapse, anybody left up there should be uncontaminated. If the colony was somewhat self sufficient, they could survive for an extended period unaided.
They would probably send someone to find out what the hell is going on after a while. A scenario that starts out like Planet Of The Apes would be fun.
An interesting potential end game goal would be to secure a launch site, and evacuate as many survivors as possible to a lunar colony.
Alternatively, given the bleak setting (and infection of all humans with the blob) evacuation might be impractical and the endgame objective could be to secure a mass driver facility and launch enough supplies, seeds, medicine, equipment, etc to the unaffected lunar colony, to ensure humanity’s long term survival.
If we wanted to be REALLLY bleak, the evacuation or final resupply might be followed by a mass bombardment from orbital WMDs or something, to destroy the biosphere and deny our enemies the use of the planet. Literal scorched earth tactics.
