Super cute! Really good writing.
This comment contains spoilers. For anyone reading that hasn't yet played, please go do so. It is a short and enjoyable narrative experience, and my commentary will ruin it for you since it is so story focused.
I loved the psychology of this game. I didn't think of it, but the other commenter's comparison to The Stanley Parable is apt, and I adore that game. The little choice at the end was far more intriguing than I would have expected from the game up to that point, which was a fun surprise and certainly comparable to the hilarious charm of The Stanley Parable.
I chose to roll the Fair Die. Of course, since I rolled a 3, I'm left wondering if it truly was fair! But never could I go for the fixed die, since that would seem to defeat the point. I felt compelled to try and stick it to the unseen narrator, who had become a sort of adversary to overcome. Rolling a guaranteed 6 would have been such a cheap way out, like I did it their way instead of my way. And yet, my way didn't work out either, and here I am, more delighted than ever to have lost a game!