一个简单的拼图游戏，可以设置游戏难度，使用双击鼠标或者空格来移动方块直到全部移动到正确位置（按数字从左到右从上倒下）-A simple jigsaw puzzle, you can set the game difficulty, use double-click the mouse or space to move the box until all moved to the correct position (according to figures from the previous fall from left to right)