Neat little game, aesthetically very pleasing and does a great job of conveying the theme.
My first thought was that after catching a fish they were leading you in the direction of the fastest path to your destination, but sadly that was not the case. It would have been a cool feature that gave the fish some purpose.
I got stuck on a bunch of dead ends up but was able to make it to the destined light house, it gave me another new destination, but when I hit that one, it didn't reveal any more.
Overall it was a fun game, nice work.