Don't know if you have a schedule set or just work when inspiration strikes but definitely just force yourself to set an hour aside each day just to chill or go to a Starbucks or something just a brain break essentially. Have seen too many creators burn out lately, at least your game isn't lacking but do take care of yourself as well!
It's mostly just 'whatever free time I have,' waiting for inspiration is a surefire way to never accomplish anything as a writer. I learned that the hard way, took me way too many years to figure it out while writing casually. Motivation is the enemy, not an ally.
Anyways, unsolicited life advice aside; thank you for caring! As a dev it sure feels like not many people do lol. I have friends yelling at me to take breaks so I'm trying to find a good balance, this Steam release definitely adds a lot of stress to keep going though.