As far as critique goes, I second jonesbros- it's amazing what a little trimming of your clips can do for the dynamics of a fast paced scene. I've shot some fight stuff that looked pretty awful if you watched the raw takes but was able to get something respectable out of it by choosing good places to cut and speeding up certain key points in the action.
On the pro side, I have to congradulate you on a great idea. I love time paradox/loop stuff, and watching this for the first time gave me the slightest bit of chill in my spine when I saw what you did. Also, your on the right track with the sound effects you did for the fight scene, including the grunt pass. Level wise, I think the background audio could have been a bit louder but sound wise it was really good.
I look forward to seeing your next vid!