Fun! I wish the game would show me the tile i would land on when hovering over a number, because counting is boring, but i suppose that would trivialize the game.
I think a lot of game mechanics unfortunately boil down to "X is boring" eventually... I considered adding a feature like that but it seemed as though it would really just push the challenge of optimization off to some other boring task (i.e. skimming your cursor back and forth across the screen).
Anyway if counting is boring just don't count. Take a risk. >:) That's what i do 90% of the time, I just count when I really need to know, and I think it's a lot more fun that way.