A girl with mild autism uses Minecraft to cope when she's overwhelmed. Here's the kingdom she built. I've never played Minecraft, but my understanding is that it is pretty manual - she obviously spent so much time on this. Very impressive accomplishment!
"Whatever you do in life, find a place where you can play to your strengths. - People with autism (or ADHD) have more in common with others than we think. One major thing is this: if we get the chance to play to our strengths, boy can we play to our strengths."