Hey mate 
Good to see a full cut of it!
Some comments:
-didn’t really understand the whole story. The building at the beginning was nice…but then it seemed to just cut to a montage of chasing shots…switching from daytime, to nightime, etc etc. I think the place where the seemingly-random-sequence-of-events starts was when he covered that egg thing with his shirt. I was intrigued as to what it was…was hoping he’d examine it closer etc…but then it just went into montage-mode. Maybe a more linear and intuitive ordering of the shots would help? Like maybe have the “jumping at the screen” shot sooner, and end with the night shot, to imply that the guy got killed and the alien is still on the prowl?
-the animation for the jumping-at-the-screen shot lacked anticipation…I’d suggest having him sort of do a back-step before the jump, to give him (the alien) more weight and to preface the jump with some anticipation
-yea the audio was a bit weird in some places…check to make sure that you’re never going “into the red” when it comes to decibles with your audio editing program
-it looks like you did some sky replacements in some of the shots…but not all…this broke up the continuity at the beginning
-would’ve been nice to have some foley sound. Just having the musical track distances your audience from the action…but adding all the foley for a lengthy short like yours would be very time consuming so I’m assuming you’ll be leaving it out
Good job overall! Looking forward to the next draft 