diff --git a/Assets/Scripts/GameManager.cs b/Assets/Scripts/GameManager.cs
index 241d70d..8f9ba43 100644
--- a/Assets/Scripts/GameManager.cs
+++ b/Assets/Scripts/GameManager.cs
@@ -1,29 +1,119 @@
 using System.Collections;
 using System.Collections.Generic;
+using TMPro;
 using UnityEngine;
+using UnityEngine.UI;
 
+/// <summary>
+/// This is the game state manager on the phone side
+/// </summary>
 public class GameManager : MonoBehaviour
 {
-    // Start is called before the first frame update
-    void Start()
+    private GameState currentState;
+    private List<Player> players = new List<Player>();
+
+    public float explanationTime = 4f;
+    private float currentExplanationTime = 0;
+
+    public InputField roomCodeField;
+    public TextMeshProUGUI roomError;
+    public InputField playerNameField;
+    public TextMeshProUGUI nameError;
+
+    private void Start()
+    {
+        currentExplanationTime = explanationTime;
+    }
+
+    public GameState GetCurrentState()
+    {
+        return currentState;
+    }
+
+    /// <summary>
+    /// Send your name and game room to the server
+    /// </summary>
+    public void PlayerValidateNameAndServerRoom()
+    {
+        //check if the room exists, if not display an error message
+
+        //if succeed, then the player to the server
+
+        //if succeed, change the state and change page
+        currentState = GameState.WaitingForOtherPlayersToJoin;
+    }
+
+    /// <summary>
+    /// Call this only by the first player
+    /// </summary>
+    public void StartGame()
     {
 
     }
 
-    // Update is called once per frame
-    void Update()
+    /// <summary>
+    /// Dislay on the screen the current prompt ask to you and another player
+    /// Also show all the camera stuff
+    /// </summary>
+    /// <param name="_prompt">The prompt to display</param>
+    public void MakeAProposition(Prompt _prompt)
     {
 
     }
+
+    /// <summary>
+    /// Create a proposition from the picture taken and send it to server.
+    /// Then go to next proposition (if any) or the page "WaitingForOtherPlayers"
+    /// </summary>
+    public void SubmitProposition()
+    {
+        Proposition temp = new Proposition();
+
+    }
+
+    /// <summary>
+    /// Display the voting page
+    /// </summary>
+    public void StartToVote()
+    {
+
+    }
+
+    /// <summary>
+    /// Choose one result and send it to the server
+    /// Then go to the next vote (if any) or to the page "WaitingForOtherPlayers"
+    /// </summary>
+    public void Vote()
+    {
+
+    }
+
+    /// <summary>
+    /// Display the UI of the end screen
+    /// </summary>
+    public void DisplayEndScreen()
+    {
+
+    }
+
+    /// <summary>
+    /// Automatically called when something change in your room
+    /// </summary>
+    private void OnRoomUpdate()
+    {
+
+    }
+
 }
 
 public enum GameState
 {
     EnteringName,
-    WaitingForOtherPlayers,
+    WaitingForOtherPlayersToJoin,
     Explanation,
     MakeProposition,
-    PropositionSent,
+    PropositionsSent,
+    WaitingForOtherPlayers,
     VotingTime,
     Ending
 }