This of course would permit you to gain gigantic amounts of information about the universe, thereby violating the Uncertainty Principle. If you gather information about a physical system, and then gather more information at a later time, you won't be able to meaningfully combine the data from the two measurements because the system will have randomly changed in ways that render the combination useless. The upshot of this is that the Uncertainty Principle establishes temporal irreversibility. Time has an unambiguous arrow defined by the necessary degradation of information arising from the Uncertainty Principle. Well, let me talk about temporal reversibility.
Computer games permit temporal reversibility within their universes.
In effect, you went back in time and changed your decision. Note that this action proves your possession of free will. If you choose path A, then one could argue that you were predestined to choose path A, but if you go back and choose path B, then there can be no arguement about predestination. Temporal reversibility allows us to prove free will. It would seem that some people have it in for free will.