Super interesting game with great worldbuilding! Currently the mood system is very strange to me as I can spend 7 months relaxing and still have it go down? But then again this is a WIP so yeah :P Very excited to see how it will develop.
Yeah, the older you get the worse the mood gets(at the start 2/3 months are enought but in the end even if you stop cultivating and put all in relaxation your mood lowers) so you end up being killed by your iner demons