freegish

Sticky and slick logic game

It is a physics simulation platformer where you control a blob of tar. It can slick and slide and jump. There is also a multiplayer with modes like sumo wrestling and football. This is gish engine, which was released under GPL license with free assests: <a href="http://crypticsea.blogspot.com/2010/05/gish-open-source.html">http://crypticsea.blogspot.com/2010/05/gish-open-source.html</a>