Ha, this looks really cool. I like what you did with the black and white only pallete giving it an old cartoon feeling. Reminds me of my cat where every year he would catch a couple of mice, unfortunately he left all of the mouse's guts on the porch and it was disgusting. Nonetheless, I think the only thing that's off are the pixelated question marks above the cat. It sticks out because nothing else looks like it, where you could have done the broken heart and the diamonds the same way. I don't know, it just doesn't fit with anything else in the picture.
I was hoping someone would mention the question marks. I was really unsure if I should change the font up or not. Changed it. Looks way better! Also added a shadow under the cat, that was buggin' me too. haha