The idea is based of the quite old game Rampart, but transformed into a micro world (the topic).
Basically you build a wall around an area, where your bacteria can life. They need to have contact to a feeding fluid to survive a longer time. So you the walls area inside the walls is filled by that fluid. The food comes from a food core that already exist on the field.
Inside the fluid the bacteria can create large slingshots that allow to shoot spores to another field. If there are no other bacteria present the spores can build a new colony.
When there is already a colony the spores explode onto the walls of that colony, letting the fluid float away.
You can read about the game idea and the development at github: SporeWars
Hopefully I can finish the project. There is quite a lot to do.
I will go and continue on that. Until now I had a huge time problem (I had to spend my time one other things). Finally this will give me the freedom to add some things that are floating though my mind.