Green button on the left of the center = Move the camera back and forth.
Green button on the right of the center = Camera orbit (360 °).
Slider in the upper left of the center = Direction of travel of the camera.
"play dance" button on left top = Start / interrupt / resume character dance
"exit app" button on right top = Exit app
You can change two car models by double tapping the car.
When the character is stopped dancing, tapping the character will turn it towards the camera.