While this game is fun to do on the side a little, the ending is rather anticlimactic, and if you pay constant attention to the game it takes a whole day.
***SPOILERS***
The ending is that you reach the border of the universe quite literally and it seems that a jelly person sort of thing was sent by the jelly government from the 10th dimension to make sure nobody was crossing the border. The only real reward you get is a gold button that says winner and it just kind of floats there. Nothing to do beyond that point.