For this to have been made as a project in just four days is really a rather impressive feat, and the film certainly met all the expectations of a noir piece. I thought, for the brief screen time they were given, the actors gave interestingly nuanced performances, and I did enjoy the ending. That said, I thought that the same, long shot being used over and over got to be quite boring, though that's understandable since you were experimenting with tracking. I'd suggest not framing the action so closely, it became quite difficult to see exactly what was going on at times, though the claustrophobic feel produced as a result was interesting. There were also some problems with sound, I thought the music was too loud and I had some difficulty hearing the dialogue, but otherwise I thought it was a solid short and certainly well-crafted for the time allotted.