diff --git a/Assets/Scripts/GameManager.cs b/Assets/Scripts/GameManager.cs
index cefaed4..6d25655 100644
--- a/Assets/Scripts/GameManager.cs
+++ b/Assets/Scripts/GameManager.cs
@@ -4,6 +4,7 @@
 using Firebase.Database;
 using Firebase.Extensions;
 using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
 using TMPro;
 using UnityEngine;
 using static UnityEditor.Experimental.AssetDatabaseExperimental.AssetDatabaseCounters;
@@ -57,6 +58,13 @@ private void Start()
     {
         currentExplanationTime = explanationTime;
         HomeConnection.SetActive(true);
+        WaitingRoom.SetActive(false);
+        BeforeStart.SetActive(false);
+        TakePicture.SetActive(false);
+        VotePicture.SetActive(false);
+        WaitingOtherPlayers.SetActive(false);
+        EndGame.SetActive(false);
+
         submitNewPlayer.interactable = false;
     }
 
@@ -82,6 +90,7 @@ private void Update()
             if (duration.TotalMilliseconds <= 0)
             {
                 Debug.Log("It's time to make proposition !");
+                endOfExplanationDate = DateTime.MinValue;
             }
         }
     }
@@ -288,10 +297,13 @@ public void DisplayEndScreen()
     /// </summary>
     private void OnRoomUpdate(object sender, ValueChangedEventArgs e)
     {
+        Debug.Log("begin OnRoomUpdate");
         try
         {
-            if (e!= null)
+            if (e?.Snapshot?.GetRawJsonValue() != null)
             {
+                string JSON = e.Snapshot.GetRawJsonValue();
+                Debug.Log($"your room has been updated :\n{JSON}");
                 myRoom = JsonConvert.DeserializeObject<Room>(e.Snapshot.GetRawJsonValue());
                 
             }
@@ -302,12 +314,15 @@ private void OnRoomUpdate(object sender, ValueChangedEventArgs e)
         }
         if (myRoom == null)
         {
+            Debug.Log("myroom is null");
             return;
         }
         switch (myRoom.currentState)
         {
             case (int)GameState.WaitingForOtherPlayersToJoin:
                 {
+                    Debug.Log("update player List");
+                    Debug.Log(myRoom.GetPlayerList());
                     CheckIfIAmTheFirst(myRoom.GetPlayerList());
                     UpdateDisplayedListUser(myRoom.GetPlayerList());
                     break;