Don't know if I make it much further. I'm now level 30, but the percentage goes up soooooo sloOoOoOowly now... but, for such a simple concept it's surprisingly addictive. Probably due to the random perks, gets me hooked anytime in a game. Nice job!
I think you rigged the system. Saw a handful times that it stopped on a red fish, but just popping over to SPD+ and Blue fish+, every... single... time ;)