Uh...
Well, it was a good atempt, but you failed. Sorry. Here's a few pointers, just in case you want to make another. The hit detection is terrible, don't do boxes. Make an end, I eventualy got so big, I couldn't even see the fish spawn. This is my personal opinion, but don't make the other fish grow as you grow, that kinda makes it impossible. And finally, the game's WAY too easy. Don't give the fish the ability to eat a fish 1/2 a size larger than it.