Before

After

 Your Original

Nice cat doing what cats do best. 1. Here I cropped out the unessential parts of the couch, leaving enough for a pleasant border for the subject. 2. Straightened the horizon. 3. I darkened parts of the cat and couch. Keep in mind that light areas in a frame steal attention away from the main subject—in this case, the cat's sleeping face. 4. The overall sharpness is lacking. However the color contrast and the soft mood of the subject matter compensated somewhat. Work was done in Photoshop & NIK Vivesa       Milton