Koopa Canyon

Koopa Canyon is the first level of World 2 in Yoshi's New Island. It is similar to Visit Koopa And Para-Koopa from Super Mario World 2: Yoshi's Island­ and Rock 'n' Fall from Yoshi's Island DS for featuring Koopa Troopas, Koopa Paratroopas, and slab-like platforms that may fall when stepped on.

Overview
Yoshi starts in an area where he has to traverse many stone slabs, some of which fall down by stepping on them. He must also contend with a number of Koopa Troopas and Koopa Paratroopas, as well as a line of Shy Guys which can all be taken out with a Koopa Shell to obtain an extra life. At the end of the road, there is a door that leads to another section with a Checkpoint Ring and a pipe which produces Metal Guys. Yoshi must ingest a Metal Guy and turn it into a Metal Eggdozer, then roll it through a series of stone walls to break them. Another pipe that spawns Metal Guys is found afterwards, followed by a long bed of spikes, a ledge and a pipe that leads to the next area. Once here, Yoshi must evade large stone blocks that descend from above before reaching the Goal Ring.

Smiley Flowers

 * Smiley Flower 1: The first Smiley Flower floats below some blocks in an area with three Koopa Paratroopas. Yoshi can throw a Koopa Shell at the Smiley Flower through an opening to obtain it.
 * Smiley Flower 2: The second Smiley Flower is located inside a tight tunnel, shortly after a field with Shy Guys. In order to obtain the flower, Yoshi must spit a Koopa Shell through this tunnel. To make it possible to collect it, he should not step on the gray-purple block above it, as it shuts the opening to the flower.
 * Smiley Flower 3: Just after the location of the previous Smiley Flower, Yoshi has to bounce on two Koopa Paratroopas to reach a ledge to the far right. Going inside a pipe, he enters a room where he must first destroy two soft blocks, then trigger a purple block to fall on the ground so it forms a short elevation to an opening to the third Smiley Flower. A nearby Koopa Troopa provides a shell which can then be slid onto the block through the opening, collecting the flower.
 * Smiley Flower 4: The fourth Smiley Flower is concealed behind a stairway of stone slabs near a bed of spikes. Yoshi must produce a Metal Eggdozer from the second pipe that spawns Metal Guys, then toss it and follow it past the spikes. If chased to the other end, the Metal Eggdozer will destroy the slabs that block the access to the Smiley Flower and allow Yoshi to grab it.
 * Smiley Flower 5: The fifth Smiley Flower is at the end of the segment with stone blocks falling from above. Yoshi must dash to the flower and collect it before a block lands over it.

Message Block information
"Metal Eggdozers can break through rock. Roll one and follow its path of destruction!"