It seems you've scaled it up a little unevenly at the moment, which means its a little warped in places. You can post 1x scale images here, as we can simply click on the image to scale it up.
Currently he looks like he's leaning back a bit too far. His legs aren't really in a position to support his weight. It would be nice to see a more defined light source to give him some more shape. I do like the character. He's pretty cute.