I love pirate and island hopping games (big fan of Don't Starve Shipwrecked). You did pretty well with this one. Graphics are outstanding, I like how much attention you dedicated to all these little details (like the birdies flying away and coming back).
The "thirst" meter and how game uses that word confused me at first (maybe because there is no good word for not being thirsty?), but then I decided "well, for me it is just the other way around" - and from there things went smoothly.
Good game!