Some random comments:
-please let us use the mouse wheel to scroll through the vendors' items list.
-it could be nice to automatically close/exit the vendor menu when I click elsewhere to go see another vendor.
-an automatic grapple order when attacking from the ship could be nice. I always forgot to command my sailors to first grapple before attacking.
-I think I saw some weird code text at the end of the questions during the intro, something like "FF#1...". Colours code?
-I bought fish but I could not find it when I tried to place it on my ship. Weird?
-sometimes when I click "BUY" it looks like the game doesn't register it. It may be because I tried to buy several things consequently.
-I'd love a higher walking speed for my captain when on friendly island, especially on large islands.
-some animations during travelling would be welcome. The first time I travelled I thought the game bugged because I couldn't see anything indicating the "movement". Maybe just some clouds and background ships scrolling from right to left could be enough.
-using the arrow keys on the world map only scroll the island in the background. Maybe it should scroll the map.
-does grindstone work? I could see the added "star", but I didn't find differences in the weapon attributes.
-I may be stupid, but I always search for the sail command in the ship menu... by the way, sailing directly from the world map, if all sailors are on the ship, should be an option!
And here we are! Awesome alpha by the way, all the basic modules are working great.