This has a lot of potential. It feels great, the UI is really intuitive and the gameplay is chunky and satisfying. I hope that there's more gameplay puzzles later, aside from just 'get more stuff to get more stuff', because I think this game would be very well suited for it.
Now, it does seem to have some problems. It froze for me multiple times on trying to set sail to a new island, placing watchtowers can cause the game to go nuts flickering the placement range indicator all over the place, and at one point it decided I wasn't allowed to use the port anymore. But that's all fixable. This is a great foundation for a lot of cool ideas, and I look forward to seeing more.