From Creatures Wikia
Similar to Terra, it has a changeable background, allowing you to pick from several themes - underwater, desert, rainforest and more. A complicated weather system works in unison with this, changing patterns according to the theme you've chosen.
A control panel allows you to control some of the CA and smells, which will also change automatically with the theme. This allows you to make it nice and hot for your Magma Norns even when using the rainforest theme! Humid rainforest. Ick. Some critters and plants depend on certain things to be and not be there - so you have to keep that in mind when playing around with it.
In 2010, Liam called for assistance in finishing off some of the areas.