Perhaps you are working out of the analogy of a wound-up clock: one winds up a clock and after that, the clock seems to run automatically. But to say it runs automatically is incomplete: the person's input is present in the potential energy stored in the mechanism of the clock. Sooner or later, as the clock works, that energy is used up and the clock stops.
Anything that is wound up eventually stops.
Anything that is begun, eventually ceases.
A universe that would be wound up, begun could not continue existing indefinitely, automatically.