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1. Game set up 2. (Group activity) Y Speed (c) 3. Program a jump 4. (Group activity) An infinite game (c) 5. Design and clone obstacles 6. Program scrolling obstacles 7. Run into obstacles 8. Add a score 9. Design and clone collectibles 10. Program scrolling collectibles 11. (Optional) Multiple collectibles 12. (Optional) Scrolling background

Project 544: Infinite Runner

12. (Optional) Scrolling background

To make this feel more "realistic" you could add background details that also scroll by. Details closer to your player will scroll faster, and details in the far background will scroll slower.
Starting point file for this challenge

Your goal

Hint: show steps

Steps

1. Create another sprite

Some ideas for background details could be clumps of grass, flowers, trees, or buildings. 

2. Duplicate the cloning and scrolling code over

Go into your obstacle's code, and find the code that asks it to clone itself and the code that tells the clones to move. Click and drag both of these over on top of your new background sprite.