First off crop a bit off the top and remove the white space section, that greatly improves the feeling of this photo. White spaces like those tend to lead the eye away from the action. Other than that, I think you really have an engaging photo. I really enjoy the different elements, the people talking, the wheelchair. The person on the left seems to be a tad to late or early (if you get my drift). Still well done, highly rated.
Seems like you tried to include too much in this photo. Looks like there's some potentially interesting stuff going on in the right (two women, one with cane; seated guy; person in wheelchair; man sitting down on bench). Might have been good to fill the frame with that part of the scene, omitting the passerby on the left.
The subject I assume is referring to the people on the right. This composition loses them and I focus on the spilled water in the middle. Get closer, adjust your angle, get into the shot so that I can focus on what you want me to... as it is now, I have to many competing elements to find one central focal point.