I think I've got it!
Not unlocked yetSolve 1-5
Rotating Numbers
Not unlocked yetSolve 1-X
A little push...
Not unlocked yetSolve 2-5
Total pushover!
Not unlocked yetSolve 2-X
Copycat
Not unlocked yetSolve 3-5
Where I belong...
Not unlocked yetSolve 3-X
Attractive!
Not unlocked yetSolve 4-5
The last piece
Not unlocked yetSolve 4-X
Not hard enough!
Not unlocked yetSolve 5-5
NUMTATE
Not unlocked yetSolve 5-X
Halfway through
Not unlocked yetSolve 50% of all levels
Completionist
Not unlocked yetComplete the Game 100%
Creator
Not unlocked yetSolve a custom level you made while testing it