You have to be very careful with shadows underneath your subject when you retouch like this. If they are gone it just looks fake, and at least one here doesn't have shadows, which is disturbing to me. Apart from that it's a nice looking photo, but it lacks a little bit finesse to be ribbon material. A subtle vignette, or quite simply darkened the corners adds more depth to images, and is usually very pleasing to the eye. 5
My understanding of this challenge was to go out to a spot and park your camera, then observe the area to find the hidden rhythms of the people walking by. Finally, through photoshop, use your images to reveal the rhythms you observed. I think this image exemplifies the challenge by you observing the area and revealing the rhtyhm of the people passing by in your final photo!