The last stars will burn out in 120 trillion years

We think. We still haven’t solved things like the dark matter/energy problem. The answer to that alone could drastically change what we estimate will happen in the distant future.

We also haven’t tried every possible configuration of atoms to see if anything creates a portal to an infinite energy dimension or a perpetual motion machine or something we can use to make our own stars

Infinite energy is cheating. Same with travelling backwards in time.

My intuition tells me the universe doesn’t allow cheaters.

But then I’m just an evolved bag of water cells clinging onto a clump of rock so what the fuck do I know?

Time travel is allowed for under our current models. Or rather, time travel doesn’t affect most parts of the current models, so it’s not cheating.
We can only time travel to the future or i am wrong?
Currently yes, but there’s nothing inherent in there that’s says there’s no way for us to move backwards

From what i know you need to go faster than the speed of light which is not possible theorically

PS: i am not a scientist i don’t know much, only some basic shit i learned for curiosity