EDIT
First few thoughts (before the edit): Glad you know that the north pole isn't the north end of a magnet (well I phrased that poorly, but you know what I mean).
Also what happened to the formatting? Guessing you copy pasted it here, but just wondering if it is a stylistic choice (you never know).
Anyway, as mizal mentioned, a lot of this is pretty much just information on the setting. Personally, I like that you seem to be grounding this in reality (to an extent) by giving me fun facts.
Moving on, if this is the first page, I have to say it feels a bit like narration to the opening part of a movie. It goes on for a good amount of time without introducing the main character, heck I'm not sure there is even going to be a plot of any kind. It might all just be a documentary playing in a classroom, who knows!
Note that this should be fixed easily enough by just writing the next 'scene'.
I didn't notice mistakes in the writing itself, and I like that it goes all fancy using colons and commas and what not (I think this is called complicated sentence structure, or at least something to that effect). It also all read pretty well, but I'm definitely no expert on these things.
Anyway, I'd say you have a solid foundation here, and if you keep up this quality at least the writing should be good.
I can't vouch for the story being interesting, because as mentioned earlier, I don't know what it is yet, I only know things about the setting.
With that said, I do wonder how much of this will be grounded in realism, and I mean literal realism, not super grim 'realism'. I am worried that you'll probably drop all the realistic aspects to make writing the thing easier, and that you are just using it now for the hook. Granted, doing that isn't bad, and it can work, I just find things grounded in reality interesting, and I suppose you might be setting up some expectations that you might not deliver on.
My main point here is, think if your story will benefit from having an opening that gives a clear indication of what the reader is getting into, this might require you to rewrite this part if you are going to go all fantastical later on in the story.
I won't go all nit picky on you, as I doubt you'd want that or even care.
Anyway, some general tips: Make sure that at some stage stakes get introduced, as they can help drive the plot and give readers a reason to care about what is happening.
Introduce the main character.
Have choices.
(Only one of those things is really necessary tho, the rest are more suggestions, which you could ignore (but make sure it is a conscious choice)).
Also screw it, here is a nitpick. Why are the towers shaped as candy cones? This does NOT sound like a place Santa wants found, so aesthetic reasons seems like a lacklustre response. Sure, it might be to 'boost morale', but I feel that the (maybe) non-sleeping snipers would prefer practicality anyway so they can get their job done. After all, firefighters are dressed the way they are for a reason, and the truck isn't just red to look nice. This can be explained away by 'it's muh story' as well, which is fine, but so far I get the feeling you want this grounded in reality, so have my concerns.
Another thing I wonder about, is Santa a saint (ie. Saint Nicholas)? Just curious, since I guess you could retcon that part, but since Saint Nicholas is one of the Santa names listed on Wikipedia (hey, it's a better source than my memory,) I feel you won't... but this is a minor thing (at the moment).
Oh got another nit pick, I wonder how you'll explain Santa giving free gifts once a year and not getting shut down from lack of income (unless he has another job? But why the heavily guarded facility? Just to protect the gifts? Who knows! Lots of ways to go with this).
I could probably think of more stuff to say, but it'd be general things and/or nitpicking. So instead I'll end it here. I think you got a good start, in that you could continue writing and make something good. However there is no way I can say this will turn out good with certainty, there simply isn't enough to make a concrete guess. I'd say, just make sure you keep this level of writing quality through out, that should definitely help a lot, and as long as your story is also interesting you should be golden (and let's be honest, in general, good ideas are a lot easier to come by than good writing).
TL;DR
Keep writing, you should be capable of making this into a good storygame. Don't forget to introduce a character and some sort of conflict (I mean, unless you want a much greater challenge, which I can admire, but you better know what you are doing if you don't have a main character/conflict).
P.S.
Come to think of it, you said Christmas Tale, not Christmas Theme Storygame. Anyway, still gonna assume it is a storygame cause you didn't specifically say it isn't, and you are looking for a coauthor on this site (which has a coauthor feature). So yeah...
Oh also, good luck if you manage to find a coauthor. It can be more of a hassle than it is worth, and you want them to be someone who'll pull their own weight. It can work, just a pretty rare sight.