How did gamers use the computer game Foldit to solve the protein folding mystery?
They untangled a structure of a atom that was able to be used to kill the AIDS virus in humans.
Who can participate in this problem solving and be a player in Foldit?
Any gamer or person can do it. It has the gamer atmospheric already and they dont need to be a doctor or scientist.

If you could solve a mystery through gaming for any kind of disease or illnes in the world, what would it be?
I would like to solve the cure of killing brain cells while abusing drugs. I mean if you ever want to stop that life style and better yourself but you cant really because you lost all those cells maybe there can be a new way to restore them.