Can also check out on this link for a web version. Although it it is not yet updated!

Instructions:

In day time you can grow your animal population and plant some grass, by first using poop to fertilize the land (Right Click) and seeds to plant some grass (Right Click on Fertilized land). Make sure you don't breed your animals too hastily, as having bad ratios between them can cause some bad issues:

1X FOX > 3X Chicken => Foxes kill the chickens

1X WOLF > 1X Sheep=> Wolves kill the sheep

1X ANY ANIMAL > 10X Other animal=> 

Other animal gets killed by ANY animal 

Win Condition:

You win by growing your population to 100. If you lose more than half of your species, you lose!

Also... Bear...