Here is the full list of all 14 Heal achievements. It takes around 2-3 hours to unlock all of the achievements on Windows.
Complete level two.
Complete level one.
Solve the tutorial puzzle.
Complete level three.
Complete level four.
Complete level five.
Complete level six.
Complete level seven.
Turn RGB machine image to white.
Walk over 1000 feet (305 meters) in level three.
In the night puzzle, color all the red pieces.
Complete the dawn ball puzzle in less than 22 seconds.
Dial the number you get later in the game.
Complete the whole game in one sitting, in less than 22 minutes.