I'm quite disappointed...
....because I know this would make a fantastic introduction to a longer song. In fact, to best sum up this track, it feels like it's working its way up to something powerful, and then it just tapers off toward the end.
Please consider my advice: Use the first 40 or so seconds of this track as the intro for one of your future tracks. I'm sure it would garner so much more positive feedback if you do so.