diff --git a/App/App/View/IngameView.swift b/App/App/View/IngameView.swift
index 3b8275d..532b6e6 100644
--- a/App/App/View/IngameView.swift
+++ b/App/App/View/IngameView.swift
@@ -1,3 +1,10 @@
+//
+//  IngameView.swift
+//  App
+//
+//  Created by etudiant2 on 21/05/2025.
+//
+
 import SwiftUI
 import SpriteKit
 import Connect4Core
@@ -60,7 +67,10 @@ struct IngameView: View {
         }
     }
     
-    init(vm: IngameVM) {
+    init(settings: NewGameVM, player1: PlayerSettingsVM, player2: PlayerSettingsVM) {
+        guard let vm = IngameVM(settings: settings, player1: player1, player2: player2)
+        else { fatalError("TODO: how to handle game setup failure") }
+        
         self._vm = StateObject(wrappedValue: vm)
         self.scene = GameScene(viewModel: vm)
     }
@@ -132,5 +142,5 @@ private struct PlayerView: View {
 }
 
 #Preview {
-    IngameView(vm: IngameVM(settings: NewGameVM(), player1: PlayerSettingsVM(type: .Human), player2: PlayerSettingsVM(type: .AISimpleNegaMax)))
+    IngameView(settings: NewGameVM(), player1: PlayerSettingsVM(type: .Human), player2: PlayerSettingsVM(type: .AISimpleNegaMax))
 }
diff --git a/App/App/View/NewGameView.swift b/App/App/View/NewGameView.swift
index 42477ac..68e1037 100644
--- a/App/App/View/NewGameView.swift
+++ b/App/App/View/NewGameView.swift
@@ -49,11 +49,7 @@ struct NewGameView: View {
             }
         }.toolbar {
             NavigationLink {
-                // NavigationLazyView(
-                let vm = IngameVM(settings: vm, player1: p1, player2: p2)
-                
-                IngameView(vm: vm)
-                // )
+                NavigationLazyView(IngameView(settings: vm, player1: p1, player2: p2))
             } label: {
                 Label("newGame.play", systemImage: "play")
             }
diff --git a/App/App/ViewModel/InGameVM.swift b/App/App/ViewModel/InGameVM.swift
index 113a23c..5e1de17 100644
--- a/App/App/ViewModel/InGameVM.swift
+++ b/App/App/ViewModel/InGameVM.swift
@@ -43,7 +43,7 @@ class IngameVM: ObservableObject {
     
     private var running: Bool = false
 
-    init(settings: NewGameVM, player1: PlayerSettingsVM, player2: PlayerSettingsVM) {
+    init?(settings: NewGameVM, player1: PlayerSettingsVM, player2: PlayerSettingsVM) {
         let fmt = DateFormatter()
         fmt.locale = Locale(identifier: "EN") // No "root" locale?
         self.gameName = fmt.string(from: Date.now)
@@ -57,10 +57,10 @@ class IngameVM: ObservableObject {
             Int(settings.height),
             Int(settings.width),
             Int(settings.alignedTokens)
-        ) else { fatalError("rule initialisation failed") }
+        ) else { return nil }
         
-        guard let player1 = Self.playerOf(settings: player1, id: .player1) else { fatalError("player initialisation failed") }
-        guard let player2 = Self.playerOf(settings: player2, id: .player2) else { fatalError("player initialisation failed") }
+        guard let player1 = Self.playerOf(settings: player1, id: .player1) else { return nil }
+        guard let player2 = Self.playerOf(settings: player2, id: .player2) else { return nil }
         
         self.game = try! Game(withRules: rules, andPlayer1: player1, andPlayer2: player2)
         
@@ -70,9 +70,11 @@ class IngameVM: ObservableObject {
         self.currentBoard = self.game.board
         
         game.addGameOverListener { board, result, player in
+            print("game over")
             DispatchQueue.main.async {
                 self.currentPlayer = .noOne
             }
+            // TODO
         }
         game.addGameChangedListener { game, result in
             if game.players.contains(where: { $0.value is ReplayPlayer }) {
@@ -80,7 +82,9 @@ class IngameVM: ObservableObject {
                 return
             }
             
-            defer { print("game saved") }
+            defer {
+                print("game saved")
+            }
             
             if result == .notFinished {
                 _ = try await Persistance.saveGame(withName: "\(self.gameName).co4", andGame: self.game, withFolderName: "connect4.games")
@@ -90,6 +94,7 @@ class IngameVM: ObservableObject {
             _ = try await Persistance.saveGameResult(withName: "savedGames.json", andGame: game, andResult: result, withFolderName: "connect4.games")
         }
         game.addGameStartedListener { board in
+            print("game started")
             // TODO
         }
         game.addBoardChangedListener { board, lastCell in