Good concept, bad execution :(
1st: the music is bad. Really bad. Not only is it not piratey at all, but it's annoying as heck. Thank god you put a mute button in.
2nd: the controls are annoying.
3rd: once you have the money to buy the next best boat, but buy other stuff instead, you can start over. No way to go back and sell stuff to correct your mistake.
4th: Gawd, the controls are annoying.
And finally, when a ship only paddles on the left side, it doesn't go left, it goes right :)