If there is enough gravity and the universe starts to collapse in on itself, would life forms that live during this phase of the universe get younger as time passes and they would need to expend energy to stay old?
Nope. Because until everything was one big black hole, entropy would still be ever-increasing.
But it brings up an interesting question. What would be the critical difference between that point in the universe and a point shortly after the Big Bang?
i see i see, let me think about it some more, thank u!