Short-lived
Okay, you've got a simple, yet enjoyable game concept on your hands, and you've pushed it home with some classy graphics and solid sound(lacking music, but it's only a little game, after all). The difficulty changes were cleverly incorporated, and the dangerous unpredictibility of Santa's movements made for reasonably fun gameplay - FOR A WHILE.
Now for the bad news.
Repetition isn't always effective. Repetition isn't always effective. Repetition isn't always effective. Repetition isn't always effective.
Okay, that's enough, but it's true - a repetition-based game such as this one will usually appeal to a limited audience. I'm an Aussie- I know how hot it is at Christmas over here, and I appreciate a game based around it. But not everyone will. You need to expand on this if you're going to get great marks- maybe have an "Aussie Christmas Party Games" suite, with a bunch of simple little games like this presented together. Overall, a good game, but not something you'll want to play again in a hurry. 4/5.