Update README.md

Author: chasingegg

README.md

@@ -3,10 +3,6 @@ a simple game using python
 
 author: Damon Gao, SJTU  
 python version: 2.7  
-game introduction:  
-mode1: control the paddle to cause the ball to bounce back to eliminate the brick  
-&emspmode2: two players control the paddle  
-run the code:  
-  1.linux/maxos: type python ball.py in command line to start  
-  2.windows: use the IDLE or so  
+game introduction: control the paddle to cause the ball to bounce back  
+run the code: type python ball.py in command line to start or use IDLE    
 contact: [email protected]