I just love this. It's a great concept and it is very well put together. All the shots of the cat are interesting and great action shots. I love the expression on the cat's face, he looks like he enjoys the sun totally.
The only thing I would change is the snow at the front. There is too much of a pattern with the 5 series of holes in the snow being all exactly the same size and shape. Maybe you should clone some different snow pattern there so that it is a bit more random. There is a bit of repetition in the background too but it is not as noticeable.