Love this game, I play it every day!
I'd like to throw out two possible scoring tweaks that might make the game even more interesting. The first is incremental scoring for boats. Right now, it never seems like there's a value play to be made with boats. Instead of 1 point per square, consider 1 point for one square, 3 points for two, 6 points for three, etc.
The other suggestion is to create some bonus for placing a wave next to a beach. I feel like it's aesthetically pleasing to put waves next to beaches, so maybe toss us an extra point when we do that?
Again, love this game!