说明：  俄罗斯方块V2.0 游戏用四个方向键控制： 左右键分别左移一格，右移一格； 上键变形（顺时针调整方块方向） 下键方块直接落底！ 空格键暂停，ESC键退出游戏； windows2000+tc2.0+graphics.h下编译！
(Tetris V2.0 With the four arrow keys to control the game: Left and right keys were left for one space, right one cell On key deformation (clockwise direction of the adjustment box) The following key box directly off the bottom! Spacebar to pause, ESC key to exit the game windows2000+ tc2.0+ graphics.h compile!)