100% non functional even after trying steps posted by others
unplayable
Temporarily switch Proton ver.
See below.
PROTON_USE_WINED3D=1 %command%
You need to temporarily switch to 4.11-13.
See below.
switch proton version temporarily
Change Proton ver. to 4.11-13. Launch game.
Quit and revert to latest Proton (8.0-1 as of writing this)
Game should now run normally.
ddr=gdi workaround works if you switch to DirectD3D rendering.
Some levels work excellent, while others suffer from significant slowdown. The first level for example has poor framerate, while the next few are very smooth.
It more or less works, but I can't give the game thumbs up with the slowdowns I experienced.
ddr=gdi workaround combined with enabling WineD3D is required to make the game run.
Some of the levels play really slow, while others are very smooth. The first level is one of those with slowdown, while the next few work excellent.
I no longer have the black screen after additional modifications, and it's technically possible to play now, but the slowdown prevents me from giving it thumbs up.
Shows only a black screen. There is working sound and it seems to accept input, but it's impossible to play when there's nothing visible.
I tried the ddr=gdi workaround with Protontricks that someone else suggested, but it didn't change anything at all.
Black screen, when moving to a new desktop changes to a white screen. The audio works, though.
The game didn't render but that was fixed by setting ddr=gdi via protontricks
Game starts and audio seems to play, suggesting the game itself works. Game is just a black screen from the start, no tweaks cause any change but an immediate crash to desktop.