What palette is this? I like the choice of colours.
It's Endesga16 slightly modified to add another brown and pure black for the outlines. I've actually linked it the game itself under "credits/other/Endesga"
You can found it here: https://lospec.com/palette-list/endesga-16
If you use Aseprite, it comes pre-installed among the default palettes.
Good Luck!