The template below is not actual size but shows how the layers are used to create the cat.
The larger circles at the left represent the two cake layers.
The bottom is the body of the cat.
The top layer has a smaller center circle cut out to use for the cat's head. Use a bowl or something similar that is about 1 inch smaller all around the outer edge and press into the center of the cake layer to create the head. You could also mark 1 inch in from the edge all around the layer and then follow the marks and cut the head out by hand.
Carefully remove the head from the center.
The remaining outer edge of the layer is to be cut and used as the ears and tail.