Includes 12 morphing mice, 36 puzzle pieces to unlock screensavers, and concept art. Secret Room: Unlockable challenges for each cat character. Helpful Resources

An in-game walkthrough to help if you get stuck on puzzles.

The "CE" in the filename indicates this is the Collector's Edition, which includes several extras over the standard version:

In this fourth installment of the Christmas Stories series, you adopt a lonely kitten on Christmas Eve only to discover he is a talking cat named Simon. You must help him stop a mysterious thief in boots who has stolen the magical from Santa’s Toy Town. Collector’s Edition Features

A separate adventure where you see how Christmas is celebrated in other lands.