Didn't realize at first how eatable fish indicator worked. Maybe make next eatable fish also glow green when switching.
I'd suggest make it so that game always start with picking one of the small fishes as my target as they are first to arrive. If I get anything else I feel like reseting level is a better option :(
I know the next target is random but people usually excude current target from next pick. In one game I had large red fish selected in a row.
Adding Leaderboard into the game seems like a great move. I should try looking into that for future games myself, thanks for the idea :)
Would be cool if I could access leader board from main menu.
Overall good job!