Seven art students, attempting to survive in a luxurious art museum while humanity ends, find that life continues in astonishing ways.

It's an interesting set up for a comedy sketch. ?But I think it's short on some specific elements for a full-fledged movie.

Casting the story with an ensembles where there are many characters but no real "main character" might work for the designated genre because comedy depends so much on the interplay of relationships. ? But, then again, it may not.

How many story threads are there? ?What's the "A" story line and who gets tagged as the main characters in it? ?What's the complementary "B" story line?

Other than mere survival, do they have an immediate and urgent objective goal? ?Is there any dramatic problem that demands action? ?Or do they just need to hunker down, hang out and wait until... whatever? ?Is there a ticking clock?

"Find that life continues in ?astonishing ways" is rather vague. ?And further ?loglines are about actions characters must take, not epiphanies they [finally] have.