Looks like it was handheld in low light, a prescription for soft and out of focus. The shot has potential though. If you know you're going to be shooting in situations like this, bring a tripod. If you don't have one and you still see a shot you must have, find something to brace yourself on, the top of a car, a trash can, a light pole, etc.
Seems a bit out of focus. A different white balance setting (i.e. Tungsten or something else with a cool color temperture) would have added a very night-like blueish tone.
Sorry for the comment if this was intentional, but my long exposures were coming out with this shift at first. Adjusting the white balance on your camera will help out immensely, and then you can perfect it with levels in editing.