New Super Mario Bros.: 6-1

World 6 is a rock world. In this level, we have to dodge Bullet Bills while platforming on some new terrain: thin ledges on cliffs. Mario has to slowly sidle along these ledges, or he can hang below them. Mario can't jump as high while standing on thin ledges, so be careful. After the first set of thin ledges, wall-jump up for the 1st Star Coin. Go down and wall-jump up a different set of walls for an item block. The 2nd Star Coin is accessible by wall-jumping up a little farther along. The 3rd Star Coin is below a thin ledge. Hang from the ledge to get it. From there, it's a straight shot to the flag. See how many Bullet Bills you can get on screen when you reach the flag for more points and possible 1-ups.