Great game all round.
I love this game the concept is original, the art is solid, the enemies are challenging, and the upgrades are worth while.
That said I have one fairly big issue with the controls.
Mrs. Claus can only shoot in exactly 8 directions this wouldn't be so bad if the enemies moved on a grid pattern ie: they only make 90 degree turns and the like.
This makes the mouse control kinda useless since you can't fire at what you pointing at since you often have large "blind spots" in your firing range unless you have the shotgun power up which makes up for this considerably but of course its limited use and most of the other power ups still suffer from the blind spots.
I truly think that once this little thing is fixed the game would a lot more fun to play especially at the higher levels.