I'm sorry but this isn't as good as your Mileena one.

You should add some shadows next time. Other than that, it looks good.

You should really try adding a bit of shading on the skin.

You gain my respect for two reasons:
1) Its Jade performing a cool kicking pose in a nice angle.
2) The use of MS Paint or something of its like and make it look decent.

After having said that I still have a few comments. The lack of shading has been mentioned, but I can't help but noticing you've made her caucasion as she was in the old Malibu comics (I believe it was the Malibu comics she appeared as white skinned, please correct me if I'm wrong), and not making her appear as the dark skinned beauty she is... How come?

Your Jade must have that Michael Jackson disease (no not the nose, the skin colour). :)

I really think you captured an awesome action pose! I don't care about shadows (or lack of shadows in this picture), I like it. :)

Good job. :)