I've just completed every achievement, my cash currently sits at 100 Unsexagintillion, yet I haven't had any indication that I've completed the game, no "well done" or anything, I have all managers and upgrades too, there's nothing else I can do in the game, and I keep looking for more stuff to do.
 "AdVenture Capitalist"){kind=icon}
 "Arkandian Revenant"){kind=icon}
 "Mr. Schyzo"){kind=icon}
 "Build the Bridge"){kind=icon}
 "GeoSketch"){kind=icon}