DiscHovery by brian 2010-12-25T21:34:00
The ladder part is merely to indicate the ground you're jumping over, there's a landing ramp past the red ladder lines that you're meant to land on, to get across it you have to hold down the forward button until you clear it.
With regards to running sluggish, there isn't a whole lot I can do since when I tried it without the stupidly inefficient shaders it looked nothing like it should have. It's probably not worth the effort of trying either.