I like it. The island inhabitants are sweet, perhaps a bit unrealistically kind. They are all so sweet I don't want to try to upend their culture after how nice they have been to Kelly...
I think the game would also make an interesting commentary on foreign policy and colonialism, where on one hand it is not the main character's place to change the island to a different culture, but at the same time a repressive culture can be harmful with far-reaching consequences, and is thus a very complicated topic.
Overall, your game is engaging and interesting, and I like how characters are described. I'm imagining Mark looks like Sisyphus from Hades (2020).