nice color, great light, nice texture, b&w good, nice lines, however, there is another pix in this challenge that has trees that shows the 'collection' aspect of this challenge. I'm sorry to say, I don't get that impression with this pix. It looks like you opened the back door to your house and took a quick snap shot of the fist thing you saw.
Great shot, good emotion on the girls faces. gave you an 8 do to the head cut in half. I know it's hard in action shots to get everything in the shot, but having shot sports for various newspapers over the years, you need to anticipate. I'd still publish it though.