I really liked the way you expressed "The boat is hard to control precisely" with the complex maneuverability of the boat.
I found the island where the hats were sold before I had enough money to buy them, but it gave me the motivation to save up the money.
The puzzle part after the boat was destroyed took a long time at first and I almost hated it, but once I got used to it, I was able to do it quickly. If the boat was broken near the target island, I could adjust the course while it was stopped, which was fun because it felt like putting in golf!