Test your rules in an evolving ecosystem

I love this game/toy. The survival mode is totally a game; you make some rules for your creature and see how long it survives against creatures with randomized rules. The simulation mode is like having an aquarium on your iphone; you watch hundreds of creatures with randomized rules look for food, run from predators, kill weaklings, mate, and impart half of their rulesbinto the offspring.
Whereas the survival mode seems to be more of testing your ideas of what would be a good evolutionary strategy, the simulation is more of taking an interest in the individual creatures (or schools of relatives) and tapping on them to see what they are doing right.
I like to play simulation mode and tap on a random creature to just watch it swim around for a while. Its intersting to me that the rules or "chromosomes" can survive for so long even if they dont seem efficient.
This is one of those apps that you enjoy so much that you begin to come up with new features that would make it even more fun, its inspirational. Read the other reviews to see some great ways to make the app even more interesting, but have no doubt that its worth the dollar.
Ive been wanting a game like this where I can easily create programs for digital creatures and watch them succeed or fail. This is (by far) the closest thing Ive found. I hope Artificial Life becomes its own genre of genetic strategy.

Xlyde about Artificial Life, v2.1.4