So this is me getting "rules lawyer"y and a bit meta but here goes:

Ending play
When someone opens the door, they are the human explorers that have arrived on GJ 237b. The game immediately ends. We do not play out the catastrophe.

They say "We do not play out the catastrophe" but who is "we" here? If someone opens the door there are three options. First possibility is that they haven't read the rules, and so "we" doesn't apply to them, as it's addressed at the reader of the rules. The second possibility is that they have read the rules and are ignoring them (or they wouldn't have opened the door in the first place) in which case we can surmise that they plan on playing out the catastrophe. And of course the third possibility is that they hadn't read the rules, but upon entering the room do so, and decide to play the game as best they can from that point forward. What exactly that would look like I don't know but I find it interesting to think about.