Adding more story would help, yes. But giving people the option to try it over again if they made a mistake with launching the Ark or shooting all missiles without knowing what'd happen and people who are curious on how it'd end the other way you know? Might want them to have that too.
And my imagination tells me either a space-alien ship was going to destroy the planet, or something massive going to collide with it. I leaned towards the colliding object because from what it shows and seems to show that fit better really haha. It really makes you think.
saucybird
if the story is great and can hook anyone who reads it, I would say add it! i love staying with a character who's awesome so i can feel awesome playing him lol if that adds any kind of insight into the subject. i wish you luck maverick :>