Proton experimental likely not needed
The game only support resolution up to 1920x1080. But there's no need to use gamescope, you can use built-in sharp/integer graphic scaling,
Works out of the box
while i will always recommend playing the original version if one can do that, WME is a decent no-hassle alternative for Steam Deck/Linux players since the original version's native Linux port is reported to be riddled with issues.
This version of the game is kind of like Doki Doki Literature Club Plus where it uses a fake OS to allow manipulation of game files. Very happy this is now properly supported on Linux and Steam Deck.
Edited desktop.dat as my resolution wasn't recognized (3440x1440)
gamemoderun %command%
No real issue really. Runs perfectly fine.
Works much better than the original experience
No tinkering required and it feels like everything just works. for controlling the mouse Touchscreen is great, R stick is great and so is the right touch pad. the controls are just very well thought out. I sometimes do wish that I had a mouse but overall i've enjoyed my experience.