You start in front of a flattened series of pink platforms. By tapping this platform with the touch screen, you raise the terrain into a series of steps that you can use to climb higher. You’ll be using this throughout the level.
A Coin Coffer hides near these two touch screen platforms. Watch out for the Galoombas patrolling nearby, as they are a bit more resilient than their Goomba cousins. The left platform contains a trio of Mini Goombas that attack once it is raised.
Stamp
The Stamp can be collected by falling inside the pit beneath one of the two touch screen platforms near the Coin Coffer. You’ll be transported to a side room with a set of touch screen platforms underneath the Stamp. Two Galoombas also patrol the area.
Green Star #1
Getting the first Green Star requires you to manipulate a wall made entirely of touch screen platforms to easily reach it. A Cat Power-Up can help you snag it with less difficulty. Players using Luigi or Peach also find it a bit easier to make the climb up to the star.
After reaching the Checkpoint Flag and taking a Warp Box, you reach this chasm, which is bridged by platforms that move when you blow into the GamePad microphone. Mind the Mini Goombas on the safe platform. You can exploit their aggressive charges by doing a short jump as they get close. If you just stand still, they’ll practically line up to get stomped.
Green Star #2
In the section where you need to cross the chasm with the small platforms, a side route takes you to a Cloud Cannon. This shoots you to a small mini-course populated by Galoombas and Dash Panels, which provides a convenient Super Star for you to run them all down. At the end of the course is the second Green Star.
Green Star #3
The last Green Star is easy to pass up if you’re rushing. Three touch screen platforms act as a set of stepping stones across a chasm. However, you can blow into the GamePad microphone to cause a moving platform to slide into position under the third touch screen platform. Use that to get to the star.
Take this last set of touch screen platform jumps calmly and carefully. Below them is a bottomless pit, and it would be a shame to have to retry the last half of the level when you’re so close to the Goal Pole.
After beating level 2-2, a path to a pipe opens up on the World Map. You can enter it to find a hidden Toad House.