It's a nice door with the bookshelves, nice vertical and horizontal lines to frame the photo. But I think this would have been better with a cleaner room beyond it. The shutters for example are too noisy.
Adorable subjects. I want to love this image but I feel like too much is competing for my eye. All the lines in all directions, oversharpened, with the lighting very even across everything, are distracting from the main event. For me, a subtle vignetting, and perhaps not so much sharpening of the books, would help.