I tried the demo also. I feel I have a little problem with vocabularies, and harder if the sentence isn’t read.
Another difficulty is the shear length just to finish the prologue, and getting to the first selection of choices.
However, it might not be too difficult if I don’t chew too many at once. (Saving is always available.)
I am not exactly sure how difficult are other games, based on few screenshots…
About Steam (+Proton) on Linux
Apparently, it can’t play this demo on Linux. And, Proton needs to be enabled to download at all.
Also, I can’t find it in Google Play Store on my phone.
I think it is designed to be impossible in VirtualBox and such, due to PlayDRM.