edited readme

README.md

@@ -15,7 +15,7 @@ The game starts at level 1. Every 10 lines the level increases and the pieces fa
 ## Commands
 ```LEFT``` and ```RIGHT``` move the current falling piece to the left or to the right.\
 ```DOWN``` accelerate the fall of the piece.\
-```A``` and ```Z``` (or ```Q``` and ```W``` on QWERTY) rotates the piece anticlockwise or clockwise.
+```A``` and ```Z``` (or ```Q``` and ```W``` on QWERTY) rotate the piece anticlockwise or clockwise.
 
 # Project contents
 ```lib``` contains the raylib library (Windows version, need to be changed if used on other OS).\
@@ -26,7 +26,7 @@ The game starts at level 1. Every 10 lines the level increases and the pieces fa
 ```tetris.data``` is read by the program to initialize the different tetrominoes.
 
 # Improvements
-## Features that could be added
+## Features to add
 - A title screen with a start button and an option to change the commands.
 - A scoreboard stored in a file.
 - A score that takes into account the tetrises completed by giving bonus points.