Luanti is all the minecraft a kid needs these days
rotopenguin
I think the xray is from ifixit? I nudged trimming it until the port and volume up button lined up just so.
I don't think that systemd has a whole lot of sleep-management architecture that does what you want? What it does have is the ability to do "suspend-then-hibernate", which would suspend for some set time, wake up, and flip over to hibernating. I've set that up on Debian (not too hard), Ubuntu (pure hell), haven't tried on SteamOS.
What you want is technically possible without changing the hardware or firmware, but I think it would take an unreasonable amount of systemd coding.
https://wiki.archlinux.org/title/Power_management/Suspend_and_hibernate#Changing_suspend_method
I don't think that dxvk is a thing that you're supposed to pull in on its own. Any recent version of Proton (and especially ProtonGE) brings its own up-to-date copy of it.
Or, you might want to go to the studio's original title, Sunshine Heavy Industries. It's pretty much just building spaceships out of legos.
It's more than enough to make HL3 a Steam exclusive. And make it run well on the Deck. If Valve really wants to gild the lily, they could put a little side-story just for the Deck's controls. A follow-up to Aperture Desk Job, perhaps.
If y'all want your own copy of Tunic, it is available in a new itch.io charity bundle.
What's wrong with "cp -r"?
As far as "having a second SD slot to facilitate the copy" goes, Anker makes decent card readers.
Try messing with ~/.var/app/io.treetubeapp.FreeTube/config/FreeTube/settings.db , in the "bounds" line.
It doesn't look like Freetube had a --fullscreen option, so you can't tell steam to just do that.
Steam's "immutable" system isn't that bad. It will revert a lot of stuff during OS updates, but Stable doesn't go through that very often. I put all of my changes into a shell script and reapply it when that happens.
Add anything with sonic in the name. Like SRB2:Persona.
Haven't tried these out on a calibrated six year old, but some that I liked which might be in the ballpark are Tinykin, a Short Hike, Smurfs Vileleaf, Loddlenaut, Lil Gator Game, Little Kitty Big City, Costume Quest, What the Golf/Car.