Get 3 stars on one level.
Try to divide by 0... error!
Complete more than PI levels.
Complete 1+1+2+3 levels.
Complete a level in less steps that the stated number.
Challenge a friend.
Challenge 5 different friends.
Challenge a random player.
Beat 3 different friends in challenge.
Win 3 consecutive challenges.
Win a challenge by beating your opponent in all tests.
Get 3 stars on three consecutive levels.
Reach a friend on the road.
Complete all Arabia levels
Complete all Arabia levels with 3 stars
Complete a lap around the world
Complete a lap around the world with 3 stars
Complete two laps around the world
Complete two laps around the world with 3 stars
Complete three laps around the world
Complete three laps around the world with 3 stars
Get 3 stars on ten consecutive levels.
Complete all Greece levels.
Complete all Greece levels with 3 stars.
Complete all Egypt levels.
Complete all Egypt levels with 3 stars.
Complete all China levels.
Complete all China levels with 3 stars.
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