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.