This is a nice peace. The composition is excellent, which is often hard to achieve with these kinds of pictures [its hard to get the "subject" to be in just the right spot at just the right time], but this piece really does work.
The lighting is what makes it, that dim blue that shines on the cat really gives her a mysterious quality, especially with her looking at you like that. The leaves and parallel windows on the ground and wall help too with the comp.
I love the colour scheme and pose: hard to believe it's a spontaneous capture. The cat looks as if she's posing for you and the expression is really wonderful. The light catching her fur is also a really nice touch.