The orb screen shows a kind of planet with hexagonal and pentagonal patches on it. On each patch lives an evolving body, and you can click on a pair of them to put them into a population and let them evolve.

On the evolution screen you can see the population as a whole from above, and watch how the different mutations travel away from the origin as fast as they can to survive.

The Intelligent Design screen makes you the omnipotent being, able to change the laws of physics on a whim.