steam-218020.log
While game intro screens are displayed correctly, only a quarter of main menu is visible and modal dialog doesn't accept mouse input. Same issue when running with Proton Experimental and using PROTON_USE_WINED3D flag.
PROTON_USE_WINED3D
Install game and run.
proton experimental
Compatibility Report
System Information
I confirm:
steam-218020.log
Symptoms
While game intro screens are displayed correctly, only a quarter of main menu is visible and modal dialog doesn't accept mouse input. Same issue when running with Proton Experimental and using

PROTON_USE_WINED3Dflag.Reproduction
Install game and run.