Update README.md

Author: shrunbr

README.md

@@ -2,6 +2,15 @@
 
 [**PLAY GAME**](https://shrunbr.github.io/flappybird-unity/)</span>
 
+The object of the game is to get the bird to cross between the pipes without touching a pipe or the ground. Use one of the controls below to make the bird move.
+
+**Controls:**
+- Spacebar
+- Left Mouse Button
+- Touch (tested on iOS)
+
+---
+### Credits
 This is my recreation of Flappy Bird [originally created by Dong Nguyen](https://en.wikipedia.org/wiki/Flappy_Bird).
 
 This is the second game I "made" in Unity as part of [The 20 Games Challenge](https://20_games_challenge.gitlab.io/challenge/).