Robin XD -
overall I think it's a really cute piece! I can see your style coming along nicely. However, there are a few things I would change.
https://s22.postimg.cc/qau6rqjqp/1534588603291.png
Here I've given you a rough redline of how the kitty's body should look. Remember that an animal's face is just about symmetrical. Their eyes are both in the same place and their ears are the same size. Don't forget that floof c:
I feel like the front legs are a bit too spaced apart and the chest is a bit wide. I've drawn a guide on where the front leg should be. I know I sound nit-picky but animal paws have four toes. Try to remember that c:
As well as that the back legs are bending completely wrong. The hind left leg is twisting over as if it is broken :'D the guide I drew was rushed and I went a bit wonky on the back legs too, apologies. ^^'
I hope that helps. As I've said before it's an overall lovely piece. Keep practising! I can see your style forming! ^0^