Completed level 12
Completed level 10
Completed a level containing 4 books
Completed level 8
Completed level 6
Completed a level containing 3 books
Completed level 4
Completed 2 levels without using undo
Completed level 2
Completed a level without using restart
Completed a level without using undo
Pushed books 15 times
Pushed books 20 times
Took 175 steps in total
Pushed books 25 times
Took 100 steps in total
Took 150 steps in total
Spent 60 seconds or more in a level
Pushed books 5 times
Took 50 steps in total
Pushed books 10 times
Spent 30 seconds or more in a level
Used undo 5 times in total
Used undo for the first time
Restarted a level for the first time
