Why Kids Create Games

I'm curious about the impulses that underlie children's drive to create games (in a variety of platforms, including Scratch), especially children ages 6-9. The factors I've seen in my own teaching seem to include:

• creating a game that is optimally hard to win, for the creator
• creating a game that is relatively easy for the creator to win
• creating a world a personally meaningful/interesting style and having total control over the game design and structure
• creating a game that challenge or otherwise impress a friend/sibling

What else do you think is going on?

What percentage of kids do you think want total control, to start with a blank slate? And what portion want to start with something like a template that they can tweak?

Let me know what you think!