Interesting concept, I'm not familiar with the genre but the way the masks tied into the game was very interesting to see. I also like that it's not as much the truth you get from one mask, but rather the bias of one of the two sides. The illustrations also added a lot to the worldbuilding.
I was really lost on the first playthrough, however. I didn't really make the connection that each mask represents the king and queen respectively until after I got the Balanced ending.
I think this concept would benefit from a longer game in which the player can appreciate the way the masks impact your perception and you have to walk the line between king and queen more.