I think the naughty Terry Pratchett novel is a really good analogy.
The game's identity and voice comes through very clearly to me. It's a satirical comedy. It takes what is normally a serious setting and genre in high fantasy and turns it into an exaggerated and hypersexual one for comedic effect. Most aspects of the game are delivering jokes in the form of either witty dialogue, puns, or visual gags.
Take the deckbuilding combat. Normally this genre of video game demands a hyper strategic frame of mind. The game subverts that expectation by having you go to a dungeon called Mourning Wood, where you then take your cards with names like Whip It and Whip It Good and use them against enemy roosters called Giant Cocks. The point is less to be a challenging and balanced game but to look and act like one seriously enough that it is a novel context for dirty jokes and puns.
The main character quests for a holy relic and it's a window to watch ladies masturbate. In order to magically shrink an object, he has to jerk off a totem with a tiny dick. There is a strict and demanding religious order whose regular rituals center around sexual spanking. The minigames are filled with ever more creative ways to put dirty imagery and shapes where there is normally none.
Maybe the jokes aren't funny for everyone. I personally enjoy them quite a bit. But whether or not the jokes actually land, or whether the mechanics are enjoyable to interact with, I don't think there should be any confusion about whether this game is taking itself as seriously as Lord of the Rings. It's a comedy more similar to movies like Monty Python and the Holy Grail, Robin Hood: Men in Tights, and Spaceballs but in video game form. A movie reference from this century would be the Dungeons and Dragons movie from a couple years ago. This genre is also still completely compatible with character development and romance but it's obviously going to be different in execution and tone from if the setting were more self serious.
The porn aspects of the game also fit pretty naturally into all this. The environment and activities build a light hearted, playful, and overtly sexual atmosphere and then the sex scenes happen as part of the climax and resolution of major story beats.