I've downloaded, but what the heck, 19MB?
I'm not sure what it is you are expecting to happen and what it is that is happening, so could youe xplain more clearly?
What do you mean by hanging and what are the edges you are talking about?
Also you are using a very big round thing with Way too many colisionpoints,but that is your choice..
I guess one of the issues is the 1000 collisionchecks per second when reaching the platforms..