Feedback On Editing and Filming

When I had posted myt first draft of the thriller project up to my blog, my teacher gave me feedback on what I could improve to make the clip better.
First off, she pointed out that I needed to export my clip as HD, which wasn't too difficult, just simply change the format in Adobe encoder for the exportation of the clip once finished.
The next thing I could improve on was the sound: There were a couple of areas where the wind was too loud and distracting, at the begining in the establishing shot and when the driver is peeing in the bushes. I lowered the volume in thece scenes where the wind noise was. My teacher also pointed out that I could do with some music or white sound to hold it all together more and buld more tenshion over a longer time. I imported a file from Freesound with the appropriate tone and cut it up into particular scenes in the clip rather than as one sound all the way through, because some areas of acting wouldn't tie in with the music/whitesound.
My teacher said that there was a long gap where there was no speach which could help me cut the clip down even further (2.40) if I placed the following speech over the shot. I also cut the shot of the driver peeing down to a reasonable length, but I kept the scene because I decided it conveyed vulnerability and suspense, but too long and the shot would be almost typical of a comedy, not a thriller.
I also added more repetition in the phone call when my friend David says 'Hello, Mr. Andrews?' so that shows more panic and worry, and covers the black space in the clip where I intended for it to create intrigue and unsurity as to what is happening, so that it grasps to viewer.
Finally I was advised to change the titles to a more 'thriller like' font and make them smaller and put them to one side so that they were more subtle. I added more effects and transitions as well to give it a creepy effect.