Even when you are a god there are things to do.
As a god, you might make your body be instantly fit and lift a million pounds and leap tall buildings.
Still, it takes time to read every book ever written or discover higher and higher mathematics. If numbers are infinite, and numbers can represent any pattern, then patterns are infinite. This means there is no end to the height of mathematics. Things just go up and up and up, never ceasing. So the game never ends.
As a god, you might slim down your mind and inhabit the body of a simpler creature, thus reliving a life determined by the constraints of exercise.
You may, even now, be a god that chose to simplify its mind and inhabit your existence.
Even as a god, you will always have things to give purpose and meaning to your life.