Algodoo

This scene shows the desperate fight between these type of "cube-bacteria". Which species will dominate the others?

How it works:

Each color represents a bacteria type. By changing the color of a bacteria you create a new "Team".

Proteins permanently fall from above, acting as nutrient source for the bacteria. They grow in size this way, and split after timee. The bigger the bacteria, the faster it splits.

If a bacteria dominates another, it can completely feed of the smaller one.

Is a bacteria is too small to multiply, it breaks into multiple proteins representing it's prior size, thus splitting it's prior power to surrounding bacteria.