The controls are a little weird. I also have a controller plugged in, and it wasn't fully supported. Normally at least the controller is easy to configure, but I get cutting perfect controller support due to time. Our game barely supports controller, and only because it was built in.
I got to the first dice, and hit R to roll, and it rolled a 6! But then nothing happened. I couldn't get out of it, so I quit. The same thing happened on the second time. Thinking it was a fluke, I relaunched the game, and got stuck with a roll of 5. I don't know if there's something else that needs to be done after rolling, but none of the buttons I pressed did anything. Not WASD or R or Q,E, or even Enter or Space. So I am not sure what is missing. And the page for the game doesn't have any information either, so I just don't know.