Great game so far! There are just a few things I can suggest since there have been several creative suggestions before me:
- It'd be great to be able to make baits with which you can catch different fish species that recharge a bit more hunger
- Jumping into the water should affect the player somehow, maybe it should give the player temporary slowness because of the wet clothes
- Tracking the days/the time spent on the current map would be useful
- some kind of roofing made of thatch would look pretty good
- small and rare obtainable items that can be used for decoration, like a pufferfish that hangs on a tiny rope