Update (Aug 17): Still not appearing in search as of today. Meanwhile the project is very much alive — we just shipped v1.3.0 with full mobile support: https://fatihnecdet.itch.io/solo-tale/devlog/1631335/v130-solo-tale-is-now-mobile-play-it-on-your-phone
So it'd be great to get indexing sorted for the players trying to find the game. I've also emailed support@itch.io (Aug 16) — happy to provide any additional info if needed.