Start this level by walking into the alcove behind the Thwomps for Green Star #1 . Walk all the way around this bottom level and enter the central area where you can ride a Thwomp up to Green Star #2 . Ride up to the top and dash along the conveyor belts to dodge the Bullet Bills, taking a quick left to acquire Green Star #3 . From here go across the conveyor belt and wait for the Thwomp to lift you up to Green Star #4 . Move through the tunnel and around to the tippy-top, wait for a Bullet Bill to be fired, then chase after it so you fall into the hole next to Green Star #5 .