Play Amazing Sonic Scene Creator
Choose Play once you get to the main game screen. The next screen allows you to choose the backdrop for your scene. There are over a dozen different choices including an island, mountain skyline, city skyline, industrial plant and clear sky.
Clicking one of the backdrops will take you to that scene. You can click the small Menu button to return to the selection screen at any time.
You will notice the scene is surrounded by tons of options. You literally have full control over how the scene looks. Choose the first thing you want to add by clicking and dragging it into the scene.
Keep in mind you can clear the scene at any time by pressing the white Reset button.
Directions
Select: Left Click