You click the 1 key to make the boy run and talk. You click the the 2 key to make the plane fly, and click space key to make the ball bounce. The heart is for background. Click the house sign to cheer. Click the green flag to change the background to backdrop1 and click the stage to change it back to blue sky.
I chose to change some of the costumes and backdrop by changing their color. This is for beginner ideas. So if you are new to scratch or just got a new scratch account feel free to remix and change things around!