way to make an entrance! if it's a review you're looking for, i'll be happy to help:
really like the window setting and the general composition. the cat's reflection should be blurred a bit to match the floor. also, darkening santa and reindeer and giving them some light inner glow will give them a moon-backlit effect. aside from that, you done good! welcome to the site, and hope to see you in future slags.