Oh wow, I've got an older version of that on one of my PDAs! Nice to see it's still going on.
There's like 100s of them. You probably know, but to anyone else vanilla is super hard. I suggest giving a few of the knock offs a shot.
I was bummed to see that those games I had previously aren't supported on my device anymore (at least according to Google). They were relaxing.
Looks like Orange might work though.
Smash Hit is a very chill game. You throw balls to smash glass, levels get progressively harder as you go along (but still chill)
Sherlock Zen is a logic puzzle game that looks like dos shareware from the win 3.1 era.
The previous version was one of the first android games I ever installed, I played through the free levels a couple of times but never bought the unlock.
I thought about it recently when doing a grid logic puzzle in a magazine I bought at the airport and went looking for it. I was sad that it didn't seem to exist anymore and eventually went down a rabbit hole and found the creators website which gave me huge nostalgia. He is also active on mastodon. So I bought the new version finally and have been thoroughly enjoying it!
Egg, Inc is really good.
It has some freemium qualities. But you can get hundreds of hours out of it by purchasing the "pro permit" and nothing else.
The game has no ads (err, you can choose to watch a single ad to get an 8 hour bonus)
Pathos Nethack - An elegant adaptation of the classic Nethack procedurally generated dungeon crawler for mobile devices.
It actually solves a lot of frustrating problems with Nethack.
Much better on mobile than the official Nethack port.
To Arms is a free deck builder. It's not pretty, but I love it. It's also free
Solitairica is a fun RPG twist on solitaire. It's a couple bucks
I play sand:box, it's free without ads, but if you want some extra materials to play with you have to pay a dollar for premium, i never get bored of it.
Sokoban! It is the classic puzzle game. There are many versions, I prefer the one on F-Droid.
I don't normally game on mobile but I occasionally play AlphaBetty. It's like a bubble pop/scrabble hybrid game
Desert Golfing. I've been playing this one for almost a decade now, probably got my $2 worth.
Any of the Papa's games from Flipline Studios. They cost a few dollars each, very casual singleplayer without any ads or IAP prompts.