Number Puzzle

Number Puzzle is a sliding puzzle that consists of a frame of numbered square tiles in random order with one tile missing.
The puzzle consists of N tiles and one empty space where the tiles can be moved.

The classic puzzle size is 15 puzzle named Game of Fifteen, or smaller 8-puzzle.
If the size is 3×3 tiles, the puzzle is called the 8-puzzle or 9-puzzle, and if 4×4 tiles, the puzzle is called the 15-puzzle or 16-puzzle.

The object of the puzzle is to place the tiles in order by making sliding moves that use the empty space.

Puzzle level:
+ Start from 2x2 grid. Once you finish this level, row or column count will increase.
+ Support from 2x2 grid to 8x8 grid.

Tile move:
+ Click move
+ Swipe move
+ Fast move: multiple tiles in one row or column can move together

Top info area:
+ Top left is time you spent on this game, click to set text color
+ Top right is sliding count
+ Click empty ground to set title background color

N Puzzle by set grid size to define N:
+ Set row number
+ Set column number

Score board:
+ Less time
+ Less step

Blind mode:
+ Once you start sliding number, all number will hide, all rely on memory

Difficulty mode:
+ Normal mode
+ Hard mode: number order is more difficulty, result as screenshot 4.

Setting:
+ Sliding tile animation, set open or close
+ Restart game
+ Game theme, change number tile color, number color, operate button color, game background color.