From the Super Mario Wiki
Tower Climb is a level in Yoshi's Story featured in the back of the first map screen. The level is extremely tall, and the Yoshis have to climb through both its interior and exterior to find all fruits necessary to exit. This level marks the first Long Jump minigame of Yoshi's Story. Enemies here include Teehee Butterflies and Bullet Bills. Oddly enough, the map screen depicts Kamek's four Toadies floating above the tower, although they never appear in the level unless the Yoshi dies, just like in all levels.
 Other Information
 Storybook Segment
Not knowing where to go, the Yoshis just climbed as high as they could. When they reached the top and looked around, they still didn't know where to go. Finding the Super happy Tree might not be as easy as they had thought!
 Names in Other Languages