That's like a couple of cryptic lines every so often that don't mean anything and don't affect the story whatsoever.
I think it's a lot more blatant in the manga or maybe the show than the light novel. The gods (players) are out right shown as shadowy figures rolling the die in a couple scenes. The one I most remember is the saving throw in the fight against the ogre(?). Hell, Goblin Slayer is just shown as a player piece at one point too.