The Sapling

The Sapling is a short simulation game where you design your own plants and animals, and put them in a world together. Or you turn on random mutations, and see what evolution does to your ecosystem!Features

• Design plants and animals.
  
• Fast-forward time to and watch the ecosystem work like a charm or slowly fall apart (probably the latter :) ).
  
• A sandbox mode where you can skip time and turn on random mutation, allowing true evolution.
  
• An instinct system where you can specify what an animal should do when it hears or sees something.
  
• A procedural animation system so any animal can perform any animation.
  
• Procedural music mixed on the fly.
  
• Everything set up to be easily extended by players.

This looks just like Spore!
Wessel Stoop has wanted to play a simulation game where you can build your own plants and animals, put them in a world, and see what happens sinc...