本次设计的游戏是俄罗斯方块，能基本达到俄罗斯方块的游戏性，需求分析如下：

（1）由方块组成的不同的随机图形会从区域上方开始缓慢落下。

（2）玩家可以做的操作有：

以90度为单位旋转每一格块。

以各自为单位左右移动方块，并且能控制方块下落的速度。

可以随时暂停和继续游戏，以及重新开始游戏。

（3）方块移到区域最下方或是在其他方块上方时就停止移动固定在该处，此时新的随机图形会出现在区域上方继续落下。

（4）当区域中某一行全部被各自填满时，则会自动消除该行并为玩家计分。

当方块堆到区域最上方时游戏结束。-The design of the game is Tetris, to achieve the basic gameplay of Tetris, requirements are as follows:

(1) a different random pattern composed of squares will slowly fall　the top of the area.

(2) the player can do operations are:

         　90 degrees rotation of each cell block.

         　In each block as a unit and move around, and can control the speed of falling blocks.

         　You can pause and resume the game at any time, and restart the game.

(3) box into the bottom area or at the top of the box to stop the movement of other fixed premises, this time a new random pattern will appear in the upper area continue to fall.

(4) When a row in the entire region are each filled, it will automatically eliminate the row and the player scoring.

When the top of the heap block to the end of the game area.