I'm now able to spot your style pretty easily. The blending of the dark blue and light blue in the sky is great. The background, however, isn't really detailed (I know this is a speed painting, but the sand is dotted and the clouds do not look very realistic). The foreground character is very well drawn and I like the idea (you mixed a sort of innocence and playfulness of childhood into what appears to be soldier). The face structure and shading is good as well.
I did want to ask you something; I noticed a number of your picture focus on young girl in either rough situations handling them extremely well or in poses where they have a tough look or a cool power, all of which are pleasant surprises compared to the multitude of other pictures that just portray women as sex objects. Why are you interested in drawing these kinds of pictures? Are you inspired to do so by something?
Also, why is "sweets" written backwards on the helmet?
The only thing I might suggest with future drawings is that you experiment with different facial structures and head sizes. Many of the females you draw look alike aside from their hair style and color.