Update README.md

Author: erdoganbavas

flappy-bird/README.md

@@ -4,8 +4,8 @@ This project's intention is to practice on web development and this project lack
 You as a starter may fork this repo and add missing features such as;
 - Play / Pause button
 - Use numbers on sprite image to show score
-- Add rotation behaviour to bird
-and more...
+- Add rotational behaviour to bird
+- and more...
 
 Speed code video and result: 
 https://youtu.be/Wk9EhC-BfKc