Well, the first thing is to take note of the focusing. Nothing looks sharp in the photo.
Secondly, try to achieve eye contact with the subject because otherwise, its a mere snapshot than anything else. If the boy was doing something more exciting that would be more reasonable.
Thirdly, the composition is unbalanced where most of the subjects seem to be squeezed to the left, that empty spaces on the right served no purpose right? If given this same picture, compose the spaces to the left and the subjects closer to the right. Rules of the third basically.
Fourthly, the flash, you did use it yes? It killed the ambient lighting so much so the foreground has a brighter scene than the background. This is bad for a photograph. You might wish to increase your ISO to maybe between 400-800 while keeping your aperture and shutter speed the same.
I hoped my humble knowledge helped in a way or two