I sure do like the background you chose.
As for the composition, try cropping so you don't see the top step. Doing so leaves to the imagination the height of the stair case. Also try cropping on the right side so the cat's eyes are in the top right area approximately as the Rule of Thirds would suggest. Doing so changes the overall composition to two simple elements -- the cat and the steps. Considering that the cat is looking to the viewer's left, that composition also allows the cat to look into that space to the left and renders the scene less static.
The cat isn't looking directly toward the camera, which brings to mind the old phrase about how difficult it is to herd cats. Better luck next time with that!