Don't go back in time

One can never go back in time, only forward. Even in going back you're going forward because you're creating a new time line that didn't already exist. We know one can go forward, but wwhat's done is done.

Hmmm, yes, but moving to an entirely new dimension would require both time and space, while only altering the realm of laws(Your current dimension)could only require time, but when you do alter time you also effect space, and vice versa. That is where you get worldline, meaning it is the same world, but on a different path, but dimension can also work. In one of kyoumas worldline jumps, time travel forward was not possible, but in the original, it is. I believe it is how we observe time and space the deems time travel either way to be difficult or simply trivial. It could in fact be harder to travel to the past than forward, since how do we alter if there is no for sure way to know, weather time is recorded, or just a fragment of reality. All we can do is to change what we can now. "The past is history, the future is a mystery, that is why this is called the Present."