README Update.

README.md

+**How the game operates:**
+Start game screen --> display prompts user to select level to play.
+Easy, Medium, or Hard.
+
+Once the level is selected, the player can press space bar to start the game.
+
+Ball starts on the paddle, then bounces back and forth between the bricks and the paddles until all the bricks are destroyed.
+OR the ball falls below the paddle.
+
+The player controls the location of the paddle by pressing on the left or right arrow key to meet the location of the ball.
+
+End game screen --> displays point total to the user.
+
+**Game objectives:**
+Destroy/break all the bricks by bouncing the ball off the paddle.
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