Notch creates a parody game called Cliffhorse in two hours using Unity game development software. The game is free, but he jokingly accepts Dogecoin donations and raises 280,000 Doge (about 100 USD) in the first day of its release. https://twitter.com/notch/status/475387391185010689 https://www.youtube.com/watch?v=a5q9AyQLlYk