While not very original, this piece is a rather nice rendition of the "futuristic industrial/urban" theme. I especially like the blueish light filtering down from the outside and the inclusion of water - the setting reminds me of some kind of water purification plant, perhaps abandoned, given the worn condition of the machinery. The hint of a larger city outside is also a nice touch.
All in all, I really like this piece. Especially for a speed painting, the quality is very high, almost photographic. If there is something more I'd like to see, it would be people to give some hint of the scale of this machinery.