normals to easy....most games are sopossed to be a challenge and fun so if you want a challenge do impossible...if your not that good and you want a challenge go on harder =)
easy:get your score to 1000
med:defeat easy nest
get score to 1500
hard:collect 75 awards and complete a big nest
hard:get score to 2500
impossible:get 110 rewards
complete large nest
get 3000 points
 "You Have To Burn The Rope"){kind=icon}
 "Sonny"){kind=icon}
 "Post it Draw it"){kind=icon}
 "create your own tower defense"){kind=icon}
 "Kongregate Chat"){kind=icon}
 "Age of War"){kind=icon}
 "Amorphous+"){kind=icon}
 "Super Smash Flash"){kind=icon}
 "GemCraft"){kind=icon}
 "ZunderFury"){kind=icon}
 "Pandemic 2"){kind=icon}
 "Micro Olympics on Mars"){kind=icon}