Okay, we got the ears, we got the tail, but now it's time we went a little further. If you're just coming out of the previous tutorial, make sure to Select None and change your active layer to Background.
EYES: Pretty straightforward; just Smudge or Darken her pupils into vertical slits. [S = half size of iris; H/O = varies, play around with them while making liberal use of the Undo function]

CLAWS: Again, not exactly brain surgery. Use Smudge to stretch her nails out. [S = size of fingernail]

WHISKERS:

Done!
I'm not sure what to do next, so scream if you have any ideas. Otherwise..."TEH ENDE!!!11!!1!!1!!!!!!!"