In game tutorial.
Changelog: v2.0 - added mice, grasshoppers, frogs, owls, birds, snakes, and hawks v3.0 - added natural disasters v4.0 - added settings v4.1 - fixed a bug involving frogs not dying depending on certain settings v5.0 - changed the population changes to become more realistic with the environment v5.1 - fixed the debug system v5.2 - added the tutorial
