add instructions to pause the game

Cynthia Rich · Cynthia Rich · commit d884d4e58bc4 · 2017-07-08T10:59:16.000-04:00
diff --git a/README.md b/README.md
@@ -9,6 +9,7 @@ A project based learning activity for people who are getting started with Git an
 3. Use the left and right arrow keys to position the shape.
 4. The goal is to create complete rows with no empty spaces.
 5. When completed, the rows will disappear.
+6. To pause the game, just press the space bar again.
 
 You can play the game at: https://githubschool.github.io/github-games/
 
