Meat Boy

The original Meat Boy is an Adobe Flash game created by Edmund McMillen and programmed by Jonathan McEntee. The game was developed over a three-week period, and was released on Newgrounds on October 5, 2008. By April 2009, it had garnered over 840,000 views at Newgrounds, and 8 million overall. Source: Wikipedia, "Super Meat Boy", available under the CC-BY-SA License.