It’s a good start. I like the buildings and the general feel of image.
The pitch black wall behind the red spheres doesn’t feel right compared to the illumination on the spheres and the sidewalk. It’s unnaturally dark.
The one source light in the scene, the street lamp, doesn’t seem to be affecting the wall or the spheres, so I’m not sure how the spheres are being illuminated with such a soft, flat light.
Maybe there is another street lamp off screen to the left, but it doesn’t seem like it. If you wanted to suggest a second street lamp, you could create the edge of a pool of light around the spheres, then make a clear separation from the pool of light from the main street lamp visible in the scene. If you do that, the lighting on the spheres should probably be much harder, with higher contrast and sharper edged shadows.
Lastly, I’m not sure that the scene should be completely surrounded by a black void. In the lower right corner, we should see a hint of the street texture. Between and behind the buildings you might add a dim sky with hints of dark clouds, to add some depth.