Green Star #1
Reaching the first Green Star is easy. Go through the first door in front of Captain Toad to get to the other side of the fence. Then stand on the glowing block near the Donut Blocks, and tap the glowing block on the GamePad touch screen. This will cause the touch screen block to rise. Dash across the Donut Blocks to reach the star.
Green Star #2
Rotate the camera until you see a series of doors to enter. Take the ground-level door on the left, and you appear next to the second Green Star. Now pass through the next door; you’re dropped onto another ledge. Follow it toward another Green Star, but this one is currently out of reach.
Green Star #3
Reaching the third Green Star is more involved than the last two. You want to use a touch screen block to reach a pit with two more large tappable blocks. Use these to rise up to another small bridge that you can cross, then call back the first block you moved to bridge the gap over to the Green Star.
Green Stars #4 and #5
Go back to the block you just used, and move it back into place. You can use this to go through a path underneath the nearby ramp to reach the fourth Green Star. Be mindful of the Peepas surrounding it. Next, walk up the ramp, and follow the Donut Blocks bridge all around the top of the level, making sure you don’t hesitate on any of the Donut Blocks, until you’re directly over the last Green Star. Just let yourself fall on it. A Big Boo will chase you during the final stretch; turn around to face it once you’re over the star.