Far too short.
It was far too short even for a trailer/preview and it didn't really tell you much about what the finished movie would be about at all. Perhaps you could have set up the story a littlw with this and also made it longer so that there was more taking place within the movie. I wasn't too keen on the choice of font, it gave a real 'unprofessional' feel to the movie, as did the speech boxes and the switching to a blank screen every now and then for some of the text. Perhaps a subtitles bar would have worked better for the speech boxes and having the next scene start and having the text over that would have been better than the blank screen. Also the movie didn't feel the whole screen and you could see part of the background, which let it down a little.