At this stage I didn't find the game fun. You had presented your idea though so I could see it having the potential to be fun. The parts of the game that I enjoyed the most was the general exploration into the unknown. I didn't really enjoy the combat though, no real control (and that ambush I had could have gone super poorly). Likely anyone who likes Sid Meier's Colonization games and turn based games of that nature would likely like it.
You aren't at the stage where you have a main selling point yet. I would say that when you add in the ship combat though you could likely be asking that question. Specifically, how will the ship interact with the rest of the party mechanics on land and what will be happening with the ship when you disembark (will enemies be able to attack it?)