You are right, this is the religion thread. I guess I felt I could speak for no one but the Mormons.
As for spaghetti monsters, I think they'd be created in the image of the angels. Then we'd know why they call it angel hair.
WAKA WAKA!
In reality, I don't know how to address such a hypothetical situation without actually encountering it. It's a fair question, but who knows how God created other life? Hopefully someone else has a thought on this topic.
Glad you enjoyed Ender's Game.