Cool & Fun Levels :
Easy : Normal Map, With a Mini Map;
Medium : Normal Map, Get the diamonds to get a time limited mini map;
Hard : Normal Map, Without a Mini Map, Be Careful to avoid the enemies or else... ;
Brutal : Invisible Map, Get the diamonds to get a time limited map;
3D Mode : 3D Map, Get the crystals to get 3 Pins, Get the Plants to get a time limited mini map;

Good Luck.