I like this game. I like the colours, the moving beings, the background pictures, and the action.
There is one thing I don't like: once in awhile, at the end of a level (or sub-level) the game gets stuck: the snowfall does not arrive, the game does not move to the next level, and the clock does not advance either. When this happens, I can still move Santa all around and shoot, but the game just won't continue, even if I leave it standing for 5 minutes.
I am playing on a Mac OSX, using Safari.