Welcome! You found a CS First Starter Project for the Gumball's Coding Adventure activity. Watch this video at CS First to learn how to build it: https://csfirst.withgoogle.com/c/cs-first/en/gumballs-coding-adventure/the-signal/introduction.html If you're a teacher: Lesson plans are also available on the CS First site. If you decide to sign up for a CS First account, you'll be able to track your students' progress, order physical materials (kits), and access your students' projects in Scratch.
Tap the green flag. Then, when the ballon says "Hello, how are you?" put your cursor anywhere on the screen, and the balloon with follow it!! :)