First off, I love the song - pretty cool.
Pretty nifty trick with the coat going on backwards.
I guess that no one's expecting to win an Oscar here, but I didn't quite get the bit at the beginning - did he get dumped because he asked for a beer?
You really needed a slightly wider shot on the 'sofa' bits, but I assume that's because you had an annoying restriction like a wall in the way. You also had some lighting issues bleaching out the right hand side of the shot in one of the later 'sofa' scenes.
It would be nice if some of the mouth movements in the 'band' scenes more closely matched the vocals, but I know that's pretty difficult to achieve.
Oh, and I bet the sigh is the one when he's climbing down the ladder...

So why
aren't you in it, huh?
I myself am made entirely of flaws, stitched together with good intentions... (Augusten Burroughs)