Tetris Battle

I always feel excited when fast managing graphics with my brain, that's why I became a keen Tetris player. It's a fantastic game which practices our ability of graphics recognition and judgment. Practiced several ways of attack include 4-wide combo, perfect-clear, and T-spin, I became ranked "God of Tetris" in Tetris Battle games and able to beat almost all my friends.

I am also curious about how Tetris program works, so I tried to write one with C language during my substitute military period. This program came out simply as a single version of it, which I sought to write it as fast as I can. Finally, it took me about 6 hours in total to do this. The code is shown as followed.