Complete 1 level.
Complete 3 levels.
Complete 6 evels.
Complete 9 levels.
Complete 20 levels.
Complete 25 levels.
Use hints for first time.
Use hints 5 times.
Complete 3 levels without using hints.
Complete 5 levels without using hints.
Use hints 7 times.
Use hints 10 times.
Complete 7 levels without using hints.
Complete 10 levels without using hints.
Complete 30 levels.