Fixed

Assets/Scripts/GameController.cs

@@ -8,7 +8,8 @@ namespace Assets.Scripts
     public class GameController : MonoBehaviour
     {
 		public static int PoolSize = 256;
-		public static float Speed = 4f;
+		public static float InitialSpeed = 4f;
+		public static float Speed = InitialSpeed;
 
         public GameObject Wall;
         public GameObject BG;
@@ -23,7 +24,9 @@ namespace Assets.Scripts
         {
             size = BG.GetComponent<SpriteRenderer>().sprite.bounds.size;
             tra = BG.GetComponent<Transform>();
-            Screen.orientation = ScreenOrientation.LandscapeLeft;
+			Screen.autorotateToLandscapeRight = true;
+			Screen.autorotateToLandscapeLeft = true;
+			Screen.orientation = ScreenOrientation.AutoRotation;
         }
 
         void Update()

Assets/Scripts/GameOver.cs

@@ -20,6 +20,9 @@ public class GameOver : MonoBehaviour
 
     void Start()
 	{
+		Screen.autorotateToLandscapeRight = true;
+		Screen.autorotateToLandscapeLeft = true;
+		Screen.orientation = ScreenOrientation.AutoRotation;
     }
 	
 	void Update ()
@@ -34,6 +37,7 @@ public class GameOver : MonoBehaviour
 
 	public void OnButtonPlayClicked()
 	{
+		GameController.Speed = GameController.InitialSpeed;
 		SceneManager.LoadScene("Main");
 	}
 

Assets/Scripts/HighScores.cs

@@ -16,6 +16,9 @@ public class HighScores : MonoBehaviour {
 
 	// Use this for initialization
 	void Start () {
+		Screen.autorotateToLandscapeRight = true;
+		Screen.autorotateToLandscapeLeft = true;
+		Screen.orientation = ScreenOrientation.AutoRotation;
 		ScoreText.text = "";
 		Server = gameObject.GetComponent(typeof(Server)) as Server;
 	}

Assets/Scripts/Menu.cs

@@ -7,7 +7,9 @@ public class Menu : MonoBehaviour {
 
 	// Use this for initialization
 	void Start () {
-	
+		Screen.autorotateToLandscapeRight = true;
+		Screen.autorotateToLandscapeLeft = true;
+		Screen.orientation = ScreenOrientation.AutoRotation;
 	}
 	
 	// Update is called once per frame

Assets/Scripts/UIController.cs

@@ -23,7 +23,7 @@ public class UIController : MonoBehaviour
 	void Start ()
 	{
 	    _player = GameObject.FindWithTag("Player").GetComponent<Player>();
-	    HighScore.enabled = false;
+	    HighScore.text = " "; // Keep position of elements, even when not displaying this one
 	    _oldHs = PlayerPrefs.GetInt("highscore");
 	}
 	
@@ -45,7 +45,7 @@ public class UIController : MonoBehaviour
     private void HandleScore()
     {
         if (_oldHs < _player.Score)
-            HighScore.enabled = true;
+			HighScore.text = "New high score!";
     }
 
     private void HandlePowerUps()
@@ -55,6 +55,5 @@ public class UIController : MonoBehaviour
     private void DisplayBattery()
     {
         Battery.sprite = BatteryImages[_player.Battery/8];
-        Progression.sprite = ProgressionSprites[_player.Progression / 5];
     }
 }