I really like the bedtime sweaterr. It'd be great in another colors too! I can't really give critique because.. I don't pixel. But I'll try to give you something..

I like the length on the sleeves and the bottom. I think it looks good like that. The end of the sleeves, to me, are bit pudgy. Maybe if they held a similar shape to how the sweater drapes at the bottom?

I think shading wise is pretty good. The only parts is the right sleeve (your right) seems a bit flat. I don't know if its my screen but I don't see as much glimmer (highlights) on it unlike the other places. And than, the draping on the left (your left) shoulder is on the flat side for me. I think you should try darkening the inner bit toward the base's waist/breast to show it's curving around the body?..

If this is hard to follow I can circle it.