Looks good, but it might be reading a little badly - the feet are sort of blending together with the body, as well as hard to understand which foot is in front and which is behind. The animation that you based upon has a contrasting color on the feet and the left leg looks like it strikes out more than yours, again, due to colors.
If you don't particularly want to change the colors, you might want to increase the range of motion of the feet and have the left foot go out more of the character to the right side of the canvas, so it creates a very obvious silhouette of a foot stepping forward.
Just my thoughts, I'm not really experienced in such low res chibi-esque animation.