Before reviewers say that the product is fiction, I know already that it is.

Two immediate issues I can see.
First, a rating of Teen? This should clearly be rated Mature or Adult, since visually, it was safer than the audio. Secondly, the comments; none of the 'Not suitable for children' or similar are written on the author comments, and a warning should be placed for the purpose of the lyrical content.
To watch safely, be under adult supervision to watch this (if you are a child), or/and have enough knowledge of the topics of pornography and self-touching. Again, visually harmless, but sexualized in audio content. Believing in the holiday is an optional field.

Another 8-bit parody song and it is about internet pornography. I found the lyrics more parodied than truth. In other words, the music overall is well produced and is enjoyable if parodied music is a deep preference to you. I personally thought the song was average.
That aside, I would prefer to listen to the full version of the instrumental than with lyrics.

Other than the parody, the rest fell flat, and predictable from the first viewing. Still, enjoy the holiday, although some do not celebrate it.
I'm rating it 6/10 for the whole.

Very Mediocre.
In some sense it is original, but that is a small portion unfortunately.
In no detail I'm going through the music, as it is used positively. Nor in detail would I go through the visuals.
It is heavily cliched. That would be the most flawed element through the whole. That is the simple reason I have rated the animation 4/10, because of the excess cliches and pop culture references, and therefore, is the most relevant as a fantasy for a teen block morning show. The story is the other cliche.
The other negative area in the animation is the characters. Stereotypes written all over.
Ending this review, I realize now this comes as a submission for NATA 2012. Theme oriented.
Still, as I'm not reviewing this for a contest, but as a general review. I overall review my results to this as a common animation, with explicit cliched elements throughout.

Pathetic, but a decent idea.

Screw it. The four released so far are better to be negatively critiqued for the riddled kids than matured critics.

The advent calendar concept is a decent idea but to some critics, I clearly see negative future exposure for this progressive project. And switch the project's rating to at least a [hard] teen rating.

And sorry to offend your hard work but of the many holiday animations from the last few years, this is one great purpose on making abominations to this holiday. I'll leave this trash for others who love this stuff.

Good, but short and a little empty.

The challenge aesthetic was a positive change, but it lacked levels and shapes.
Although original, the concept seems more aimed as an educational product to children. It's programming is nothing to argue either from casual perspectives.
Difficulty on the other hand, felt too steep. This may seem a bit cliched, but numeric difficulty progression seemed harder suited for this product. An 'easy and hard' option with numeric difficulties would influence this better.

A 5/10. The sequel's improvements are sub-par. A good variety of obstacles through levels, but steep level progression, and not to mention lack of new shapes (uncertain since I have not finished the whole game).

The standards are still visible here. 8/10.
I can't complain.

Sounds... Decent. It's quite emotional, and unique.
(First Dance Dubstep Review. A shame, as this was actually good.)

It was a great direction for the opening, a positive, calming one.
It does have a weak Low Frequency Bass in the whole, that would be my greatest flaw in this track. Perhaps second to that would be the lack of panning from the instruments. The rest, It combines itself rather well.
The song layout maybe cliched, and in the usual case, I do not demand to hear from that certain song again, but it's different in this case. In this case, I see myself hearing the song for at least a month than in 4 days, in my experienced definition of Dance Dubstep.
To the mains. And, I do admit it has a catchy bassline, and the wobble bass too, as that does not sound as cliched than in most Dance Dubstep releases. The Piano in the main added an emotional and soothing element in what would otherwise be bland without it.
Based on best instruments for me, it's the Trance-esque lead and the Piano that lured me in. The other instruments were adaptable, and gives this release friendlier elements.

A well produced release, a 8/10 overall.