All games entered for GGJ are released under a Creative Commons share, alter, no sell license. You can browse through the games and download their source files on the official website, and a couple of publications did quick hands-on playthroughs.
"Although the club is focused on game development, not everyone participating was a computer programmer. Artists and graphic designers were present to help create characters and models for the games. The goal of Global Game Jam is to a stir up a global creative buzz in games while at the same time exploring the process of development."
But the article argues that this is often just a smokescreen. "The notion here is that somehow these companies are backed into a corner, with no other option than to fire people. And that's just not true. These companies are making a choice. They're deciding that it's faster and cheaper to chuck people overboard and find new ones than it is to retrain them. The economics of cutting rather than training may seem simple, but it's a more complex calculation than most people believe. ... Many of these companies are churning through employees, laying off hundreds on one hand, while trying to hire hundreds more."