Eventually God, like all of us, got bored. So YHWH went for a stroll through the cosmos whistling something by Bach or maybe Brahms (He never could keep those two straight). God became intrigued by the pulsating stars, the aimless comets and the collapsing black holes. Soon (in space-time) YHWH had wandered so far that He was helplessly lost and didn’t know how to find his way back to the Milky Way (directions being relative in the universe). So while God searched for home, humanity was left to its own devices, which explains a lot of things.