

Not using GE-Proton9-2 will lead to pre-rendered cutscenes having showstopper issues (e.g. non-progressable black screens, "TV color test" screens, etc). This is the most up-to-date Proton/GE that fully works in my tests.

mangohud gamemoderun %command%
Pre-rendered videos don't play, it shows multi-colored tiles as if a tv had no signal
aside from the minor issue of some cutscenes not being shown, i'd say it's pretty playable with no issues

No voices in cinematics

Videos don't play, instead you get a SMPTE screen.

This game installs and loads just fine but there is no way to control it and no controller layouts had any affect.
Attempted to set up a unique layout.
Game will only load with full screen disabled. But it loads as fullscreen anyway as opossed to windowed.
There was not way to interact with the game other than touch screen and even then its nothing more than a left click (position touched on screen has no meaning).
Maybe older versions of proton GE or Experimental will allow recognition of controls.
changed screen resolution to the Deck's
some cutscenes don't play
Voices during cutscenes are missing, though BGM plays.
GE-Proton is needed to get videos to play, but the gameplay works great in either Proton version.
Excellent for casual games!
The inability to play cinematics at 4k makes the game lose it's storyline.
Momentary game pauses when a big action takes place.
All the cinematics don't play, instead you get a TV color test screen playing instead.

Game works out of box. No tweaks needed. Occasional FPS drops, but it won't affect your play experience much. This game is meant to be played with a controller, so I tested the game with a controller. Works flawlessly and all keys on the controller had registered successfully.