CellShades

Tap the screen to spill a little liquid, then watch the greedy little cells emerge, consume, swarm out and build clusters!

Switch between nine different preset behaviors, or upgrade to the Laboratory and tinker with the simulation's underlying parameters yourself!

CellShades uses just a handful of simple rules to create all kinds of different complex behaviors, from crashing waves to flowering structures to microorganisms crawling across the screen. Using the Laboratory upgrade, you can manipulate these rules and save your own custom behaviors.

Want to dig deeper? CellShades is loosely based on the concept of "cellular automata".
Click here for Wikipedia's overview on the subject.