Please post here your ideas about the rules of the game. The basic ideas include:

Creatures:
  • Move into any of the 8 directions in the grid or stand still.
  • Harvest food from a food resource.
  • Attack each other, which would cost some resources. Maybe get resources if they manage to kill another creature.
  • Duplicate themselves (i.e. breeding), which costs resources as well.
  • Die as a result of an attack, a natural hazard or lack of food.
  • Scan their environment for sources of food / foes / hazards.

This list is not comprehensive and further ideas are welcome. The world itself will be a grid with some wall tiles, some food tiles, some hazard tiles (things like holes would be static, but stuff like fire could move and spread).