Solitaire maybe? The classic Solitaire (Klondike Solitaire) is quite playable on phones, even in portrait mode. Self-plug: you can enjoy it in this mobile-first PWA (progressive web app) of mine: https://FreeSolitaire.win/
Card game wasn't a good choice of words.
> Card game wasn't a good choice of words.
Well yes, it was: “Card Crawl is a solitaire-style dungeon crawler game played with a modified deck of standard cards.”
Funnily, it’s even advertised as a solitaire game ^^
And Monument Valley which has similar game mechanics (you twist the environment around rather than make your way through it).
Regarding the ambiance: no idea :/.
But in the same vein, not on Android there is : Invisible Inc. https://store.steampowered.com/app/243970/Invisible_Inc/ and another game with a little girl and her invisible friend or something and it's turn based and tiled based and there's a back-in-time mechanic. Eh. I am useless.
Edit: https://store.steampowered.com/app/1433530/Bilal_Go/ Found out about that one. It even has Tomb Raider Go's tiles :).
I'm also a fan of Slay the Spire, mostly playing it on PC and Switch. But I triple dipped for the Android version, which has a little bit of clunkiness with the UI but the underlying game is there.
Great games, all of them.
https://en.wikipedia.org/wiki/List_of_most-played_mobile_gam...
I am not claiming it's the best format for these games but playing it on my phone was easy and great.
There's also a solo card game, the name escapes me, I spent hours on it (edit: https://play.google.com/store/apps/details?id=com.tinytoucht...).
My phone is the most available device and games are cheaper than Switch games if easy-to-pick-up is a criteria.
Anyway, it depends on what you like :).
(I didn't like an old man's tale at all, I thought it was ripoff).
edit: if some people on HN get my preferences from this post I am all ears for mobile game suggestions :).