[rangibaby]

> Is it supposed to reflect the simplicity of a back-to-nature lifestyle and the characters therein?

I'm inclined to suspect is the latter of the two; especially if kana is only employed in character speech while other parts of the game use Kanji.

This, but it’s the other way around. When characters speak to the player, who exists outside of the game world, it is in a mix of kanji and kana. When they write within the game world, it is in kana only.