Whats this retard doin?! Oh wait... thats me.
The last level is actually pretty easy, seeing as you get a never ending supply of shadows. Just keep on jumping out there crazily. Eventually you'll land on enough of them to get across. It just takes time and a little luck. Love these "play with yourself" games. I mean I get pissed at my co-op partners on online games all the time and this sorta swings that pendulum back the other way. Jack sure is one sick fuck.