Well, It's really amazing how you did it! For a mouse artist you have loads of talent! This is just a practice so I spare you from shading an background and etc.
Those wrinkles around the neck are cool! I liked them! Well, I think the legs should be a little higher... Try doing that pose by yourself and observe. I did it and the distance between my knees and my chin where my hand, so you could perhaps make the legs longer or you could make the head lower.
But hey I'm not a good on humans but anyway... I'm just giving an oppinion.