In your exploration, you will find portals to other worlds with alien terrain and harder enemies. The first world is Earth-like, and allows you to begin collecting combat equipment. You can also start basic production from gathered materials (grass, dirt, stone, trees) to maintain your food supply and build other useful items. In Fractal Chicken, you will explore worlds that are connected to each other through portals, all the while fighting the Demon Lizards. Fight and build your way through.
more information...