create an evolution game where you can design  animals and release them into the world!

can be 3D, 2D and any other D's, so have fun! also there's a twist! you have one of these in your game:  floating islands,  advanced lighting, or flying pigs!

restraints: 

1. the player can design plants, animals and even the world! (not a restraint)

2. animals and plants can die, mutate and adapt to any and all landscapes when given enough time.

3.  there MUST be a hidden reference to another game. either one you made(preferred), or from another game.