Keeping Water:
     First of all build small lakes or rain will fall and come off the
edges if you try to build right around the land straight away.

Get special stuff:
     Evapourate  water  from  different  parts  of the land so you get
special stuff by completing the bingo card in the middle.

Unlock stuff:
     Earn  a  "Master"  rank  in  all four stages to unlock the Hidden
Future in story puzzle mode.
     Successfully  complete  the  Cenozoic  Era  to unlock the Ancient
Civilization in story puzzle mode.
     Successfully complete the Mesozoic Era to unlock the Cenozoic Era
in story puzzle mode.
     Successfully  complete  the  Paleozoic Era to unlock the Mesozoic
Era in story puzzle mode.
     Successfully  complete  all  lessons  in  training mode to unlock
story puzzle and vs. puzzle modes.

Hidden Future:
     Earn  a  "Master"  rank  in  all four stages to unlock the Hidden
Future in story puzzle mode.