Reasons:
-Puzzle Generator: Isnt a finite number of puzzles for you to play. Endless puzzles for you to enjoy.
-Solo Play: Automatically saved single player experiences.
-Multiplayer: Play with or against your friends via a local, wireless network connection.
-Cross-platform (Cross-Operating System): End the Android vs iOS feud when you can play with each other.
The upgraded version can be purchased to remove ads permanently.