The game says it's best played with a controller, but my Stadia controller isn't 'seen' by the game. I have it connected via Bluetooth as well as USB.
I guess I'll make sure the Stadia controller is using 'Xinput' - I just figured it could/would be seen by the game.
Edit
Tried running the registry key from this post:
Reddit: Stadia Controller on Windows, no analog triggers?
And rebooting GOG - but the game is too old I guess. GOG is no help