Experiences/Rules
One Rule
A cell holding four grains gives one to each neighbour. That is the whole rule.
More in Rules
Conserved Light
Light can't be made or destroyed here. To gather it, you have to take it from somewhere else.
Edge of Chaos
Calm spirals on one side, turbulence on the other. Your finger is the line between them.
Energy Exchange
Two glass orbs share one fixed amount of energy. It never stops passing between them.