Pretty cool idea. I like the simplified ship combat with the adjustable speeds. It's just a small thing but I really wanted there to be a wave trail behind the ship, it felt a little weird haha :P Cool island graphics as well, good job!
The part I really liked were the combats (I hadn't seen something like that in a while). It was like meh, why trade goods when you can THROW CANNONBALLS AT SHIPS! It was cool nonetheless.
Fun game! I needed a map! Loved the combat of having to rotate around the enmy as I passed them. Was looking for another port for like 5 minutes, but thats ok becuase I was having fun killing ships while looking for another port.
The combats are cool, kinda mess but cool :D.