I like the idea of dueling to win more Jewels, maybe win whatever they have at the time of defeat but then the game could become gangs or people taking everyones Jewels.

You're going to create a game in a week and start an ICO made me nearly fall of my chair lol nice joke that was. No not anyone can make a game like this, infact a very very small number of people could and it would take a very long time. I believe their is 60k of lines of code.

Mining in-game sounds very interesting actually and I'd like to hear more.