After the intro movie and publisher sequences finish, I cannot navigate the main menu using keyboard or mouse. Is there a specific key combination I should be using in order to cycle through the options (e.g. Single Player, etc.)? Back in the day, I remember a little 'X' mouse pointer icon that no longer seems to be present in the GOG version. Do I need to make any changes to my Compatibility Settings? I'm running Windows 10 on a relatively new build. Thanks!

Perhaps it may help someone in future – in my case keyboard does not work in menus, only mouse.
During the race it's the opposite – cannot control with mouse, keyboard only :)