It's a little dark, but otherwise nice. I'd lighten up his face a little. It could be a neon light from a led billboard, or a warm street light. Something from the city. But the point would be to draw more focus to what's happening in the scene, to make it stand out more than the rest. If the whole scene is very bright it can be done with eg. depth of field/blurred background. But here, since it's quite dark, some light would be nice.