Complete 1 level. (Any difficulty)
Complete 5 levels. (Any difficulty)
Complete 10 levels. (Any difficulty)
Complete 15 levels. (Any difficulty)
Use hints for first time.
Use hints 3 times.
Use hints 5 times.
Complete 1 level without using hints.
Complete 3 levels without using hints.
Complete 5 levels without using hints.
Restart a level.
Restart a level 5 times.
Complete 20 levels. (Any difficulty)
Complete 1 level on MEDIUM difficulty.
Start a HARD difficulty level.
Start an IMPOSSIBLE difficulty level.
Use hints 10 times.