I made https://www.chesscraft.ca https://www.chesscraft.ca which has made 50-200$ a month, mostly donations, for a few years. I like games but hate almost all

I made https://www.chesscraft.ca https://www.chesscraft.ca which has made 50-200$ a month, mostly donations, for a few years. I like games but hate almost all mobile games, IAP and ads monetization, and how brainless the industry is. I looked for single player chess variant apps and found the offerings really spotty. The chess app market is oversaturated so I knew nobody was coming to save me. I started during 3 months of unemployment, then got a job with a brutal public transit commute. So I made ChessCraft for myself, mostly. So pretty standard advice: make something you know and want.