Using the same background as the first, I have built this main building, the one withing the book. The idea is you have to take out all the light and work the way to the top, castuing a shadow of the world. This will follow on from set 1. Its simpler than set 1 but has its own challenge of working out how to take them all out with out touching the lights them selves. Once you have reached the goal the demo will end.