Really Rolling Hills

Really Rolling Hills, or World 2-4, is the fourth course in World 2, and the tenth overall. It features rolling hills and a species of rat known as Skipsqueaks. It's pretty straightforward.

GS 1: Once you find the M switch that releases the stamp, go away from the camera and climb up to the Green Star.

GS 2: In the underground area, look for a green pipe. Enter it. Then, step on all the squares to reveal the Green Star and a pretty rainbow. There is a green + Clock here.

GS 3: In the area after the green pipe, fall off the cogs, and the Green Star will be in plain sight.

Stamp: To find the stamp, which is Small Mario jumping, jump on the M switch with Mario. It will be in in plain sight.