The idea of the game was that the player controls terrestrial ecosystems and their chaotic growth and blending. The player can influence growth of the ecosystems but only in a limited way. And in the end it is always the nature, that has the last word.
You goal is to reach a certain limit of points.
You gain points by filling every empty tile with a certain colour.
The closer colour to the objective, the more points you get.
You can place one sphere at a time.
You can change colour of the sphere in hand for a penalty in points.
Each placed sphere grows more spheres of its colour.
When spheres of different colour meet, they blend colour.