From the Publisher's (Ewen Cluney) web page:
“Yaruki Zero” is Japanese for “zero motivation,” and it’s meant as an ironic exhortation to myself to get things done.
My games tend to mostly be inspired by anime and other “otaku media” (manga, light novels, video games, etc.), partly because of the sheer amount of this stuff I’m exposed to, and partly because relatively few other people are trying to design such games, despite the rich variety of inspiration that’s out there. I have a tendency to flit from one project to another based on whatever I feel like working on at the time, plus freelance work can destroy the free time I would ordinarily use for working on games. I have vague aspirations to publish some of my games if/when they ever come to fruition, but between my frequent project-switching and wanting to make sure any game I try to publish is as good as I can make it.