My turn to apologize for a delayed reply :) I'm afraid it's the whole thing that doesn't work. When I start it, I just get the developer logos, then a screen with a large triangle-sort-of-robot symbol and the "press any key" text, which doesn't respond to anything I do with the controller.
Gamepad, yeah... I don't think there's anything unusual in my settings, unless there's some sort of app permission that needs to be turned on or something. It's a wireless controller, if that's somehow relevant.
Hey there! Game looks fascinating, but I haven't been able to play it on the Xbox One, as the screen which prompts "press any button to start" doesn't respond to any buttons. Tried un- and re-installing it, but no go. Quite eager to see the game, hope you can help!