I honestly haven't done enough testing on this part of it but the two approaches are to spam click in order to try to survive longer or let the fish build up to try to match a larger group which gets you more points.  I'm not sure which is the better tactic but I usually go for bigger groups in the beginning when the new fish arrive more slowly and then rapid click once it gets too fast.

Thanks.  Since this was primarily done as part of One Game  A Month I did trim some some features in order to complete it in a month.  

That is an amazing compliment.  I'm actually just getting started making games so I'm more focused on fully finishing little projects.  Once I have a few more projects I may take one and try expanding it into something more robust.

Thanks.  I'm glad you liked it.

Thanks for the comments.  If I ever put out another version I'll look into making the instructions more prominent.  The title screen/menu and game over are parts I really tried to focus on for this game.  I usually put in something bare bones.

Thanks, since it's come up twice I'll definitely look into providing more instructions up front in any future versions.