thanks for playing and I'm glad you liked it
the short answer is the physical game does not have an ending yet. however the game does have some lore ;)
the cookie is very hungry in the middle of the sea and the more cookies it gets the hunger it gets.
so if you where to do this for a day or so the cookie would get so hungry it eats all the cookies* and the game resets
*why do you think in cookie clicker when you click the cookie smaller cookies come out of it