Update README.md

Author: CSaratakij

README.md

@@ -3,9 +3,9 @@
 ![image](./screenshot/image1.png)
 
 # Getting Started
-1) Add script to Editor Folder (create one if is not exist)
+1) Add script "SceneSelector" to Editor Folder (create one if is not exist)
 2) Go to Custom -> Scene Selector
-3) Add specific scene and hit play
+3) Add specific scene and hit play in SceneSelector's play button.
 
 # Note
 - If you enable "use build setting", It will open a scene with 0 index in the project build setting when enter a playmode.