this here isn't a MiTy game. it's a sole side project of Marty (MiTy's artist), which he started as a side project during FET stagnations. there has been some poll on the MiTy patreon with a list of 'next to go' themes, far as i know cBob (MiTy founder, coder/writer) didn't like the outcome of that and there wasn't any decision about their next project, to date.
can't provide any exact update on that because i left patreon quite a while ago, but that's more or less the status quo.