Did you quit your job with the hopes this game would sustain you? If so, did you do any market research to validate that hypothesis.
There are people out there who quit their jobs to go backpacking on arduous trails for 5 months. It's long, hard work, but they do it for the other joys that come with the experience. And they do it all with the expectation of returning back to working life--not on cashing out. I don't see how what OP did is any different, other than it being a digital journey rather than a physical one.
Congrats, OP.
Some people quit their jobs and travel the world. I stayed home and made a game.