This game requires Microsoft GameInput to capture mouse movement for camera. I have installed it using protontricks -> run an arbitrary executable (.msi). It seems like it is successfully installed and game tries to load it:
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17960.410:0054:0058:trace:loaddll:build_module Loaded L"C:\\Program Files (x86)\\Microsoft GameInput\\x64\\gameinputsvc.exe" at 0000000140000000: native
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0240:fixme:reg:NtQueryLicenseValue License key L"Kernel-ProductInfo" not found
0234:err:service:process_send_start_message service L"GameInput Service" failed to start
022c:err:msi:ITERATE_StartService failed to start service L"GameInput Service" (1053)
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fixme:reg:NtQueryLicenseValue License key L"Kernel-ProductInfo" not found
(BTW Mouse does work in the Main Menu/in-game, but camera cannot move and even on Windows this is a common problem and installing this package has solved it for many people).