I am stuck on indiana jones 2 (lego) on psp?

I am in Act 1 doomtown (i think) and i have got to the point where there is a long rope and I think i have to try and swing to the other side, however I cant reach it?? any help?? Also what are the red squares on the floor for? ( i know the blue is to throw someone up and brown is for indy to use his whip)