A classic number puzzle game. There are 15000 puzzles in total. This number place can be played offline. Ideal for brain training and aging prevention. ** Characteristics of Numple Zero ** Contains 15000 puzzles Three levels Infinite undo, redo Auto save There are two types of pencil mark input. Simple operability n225zero also offers other games. Hanafuda Koikoi, Shisen puzzle, YojiPuzzle puzzle, etc.