If you had used a lower ISO and a setting better suited to shooting in the dark, I'm sure this would've scored very high. A tripod would've also helped, or even the hood of a car.. A trash can. Just something to set the camera on. Self timer completely diminishes hand shake with a tripod or an elevated surface. I really like the color of the sky, though. And the way it blends. This is not bad at all for a first challenge. Better than me, anyways.
The colors and the reflection off the windows are awesome, but I would have moved closer to the house to eliminate that distracting light from the frame. It also seems just a tad noisy; I might have went with a lower ISO and longer exposure.