You got the theme with no problem, Luilgin, but for me there wasn't any sign of the SFF/speculative fiction genre in the story. I did wonder if Dirk was meant to be some kind of robot or even a wind-up toy, and if there had been some greater hint of that then I might have given the piece the benefit of the doubt, but as it was it failed for me at that first hurdle.
As far as the joke was concerned, to my mind the double entendre of the last line lost its doubleness by your putting the "cracker" in the title, not in the body of the story, which meant as a punchline for me it rather lost its impact and some of the humour -- the timing felt just that fraction off. Also, by making the Queen obviously lascivious, it stopped the story being like the lines which are naughty but played with a straight face in the Carry On films, into something like a lubricious Sid James-ish leer, which always gave me the creeps. So while it's an undeniably humorous line, for me the way it was delivered made it that bit too broad to be comfortable with.
Writing-wise only a few minor things struck me (and I really don't know why you would even think your story-telling and writing skills are in question!). First, there shouldn't be a comma in "present Dirk" as there's no pause there, and it's not the equivalent of eg "your present, Dirk" where a comma is needed. Second, you've got "he announced" at the beginning where Tinder is presenting Dirk so the "Tinder said" at the end is otiose. I imagine you put that in since you wanted "bowing aside" but for me that continuous past doesn't quite work, not least because it makes the whole sentence rather unwieldy in length.
As for your staying with the Challenges, please do continue entering. Personally I like your serious stuff more than the humorous pieces, but that's no different from my reaction to the funny stories other members put up, and humour is so terribly subjective you're never going to please everyone anyway. But even if I didn't shortlist them, the Dark Lord pieces invariably made me smile when I came to read them, and it's no small gift to be able to lighten people's hearts in that way. So Carry On Carrying On!