Here is the full list of all 17 Magical Girl achievements.
Complete the first chapter of the game.
Complete the second chapter of the game.
Complete the third chapter of the game.
Complete the fourth chapter of the game.
Complete the fifth chapter of the game.
Complete the sixth chapter of the game.
Complete the seventh chapter of the game.
Complete the eighth chapter of the game.
Complete one puzzle in the Free Mode using the difficulty on level 1.
Complete one puzzle in the Free Mode using the difficulty on level 2.
Complete one puzzle in the Free Mode using the difficulty on level 3.
Complete one puzzle in the Free Mode using the difficulty on level 4.
Complete one puzzle in the Free Mode using the difficulty on level 5.
Complete one puzzle in the Free Mode using the difficulty on level 6.
Complete one puzzle in less than 30 seconds.
Complete one puzzle between 30 to 45 seconds.
Complete one puzzle between 45 to 60 seconds.