This stage is set up on a long platform with a comb spinning on it. The parts outside the lines are the safe points. The lines are where the teeth of the comb cross the floor. Getting in the way of one of these will send your monkey flying off the stage.
Goal Tutorial Edit
Use the stop and go technique. Wait until the comb spins, move past the line, stop, and then do it again. Repeat the stop and go technique until you reach the goal.