Android: Back Button now closes App

Assets/RothenburgAR/Scripts/UI/InputManager.cs

@@ -31,6 +31,11 @@ namespace RothenburgAR.UI
             {
                 DoRaycast(screenPoint);
             }
+
+            if (Input.GetKeyDown(KeyCode.Escape))
+            {
+                Application.Quit();
+            }
         }
 
         public void DoRaycast(Vector2 screenPoint, bool denyBlockedHits = true)