Haven’t played it, but reviews on both GOG and Steam seem to imply it is.

Any with good hardware as long as you can switch to stable and community-made ROMs.

Bandcamp, Supraph Online, Ototoy, Uta 573, Steam and GOG’s OSTs and Apple’s iTunes store have been my to-go options. No DRM, no worries. Just avoid Apple’s music subscription, as it is DRM’d.

If you like reading books, comics, etc, maybe Librera Reader?

Dunno how it is on Google Play, but it’s available FOSS and DRM free outside of it:
https://f-droid.org/packages/com.foobnix.pro.pdf.reader/

Since 10 y.o. is old enough to be a cutoff for me, PS Vita, and because modding community never stopped. You can even play some Android and PC games through wrappers in it. *-*

(Translated copypasta from the Portuguese community, yeah, but since not many English speakers understand Portuguese, worth doing)

Dunno the site, but one thing I do is to go to a site known as “AppSales” and to hide whatever titles I find with MTX with Ublock Origin filters. The process is a chore, but at least, each title needs to be hidden once and only once.

And sure, this is considering that the person uses only Google Play. I, for one, prefer to seek games in stores like Humble Bundle (owned by IGN), Itchio, and so on.