Beta.5的新东西： 1. 修改了穿过球拍的问题 2. 加了High Score的新部分 Beta.5 New Features: 1. Fixed the bug where the ball would go through the paddle 2. Added new "High Score" part

说明： 1. 按A让球拍左走，按D让球拍右走 2. 不要让球碰到红线 3. 每十五秒球会加速 4. 玩得愉快! Instructions: 1. Press A to let the racket go left, and press D to let the racket go right 2. Don't let the ball touch the red line 3. The ball gets faster every fifteen seconds 4. Have fun!