There is an inherent bug/problem in the Fishy game. Once you cross about 9000 the fish gets so big that you dont have to choose what you eat. You're big enough to eat just about everything.
Eg:
And this is what happens if you leave it to long.
I think I've reached the max points but maybe people can beat that. And no I didn't play it for close to one hour. I attended a two calls after which I just clicked play again. It takes about 15~20 mins at the most.