Getting her to jump is not my issue, she jumps, but seems to be facing the wrong way. Therefore, she won't throw het rope-pick at the target location. It may be that the camera is forced during the move, affecting the angle. Some folks have suggested that she may have to move diagonally, something a keyboard doesn't do well because the keys have to be pressed together while both jumping AND throwing the rope-ax!
Since the direction of a jump is a function of the point of view and the movement command keys, I would like to know (1) where should Lara be facing and (2) which direction she