Reduce font size in menus, fix orientation

android/gradle.properties

@@ -2,5 +2,5 @@ org.gradle.jvmargs=-Xmx1536M
 android.enableR8=true
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=1.0.2
-app.versionCode=3
+app.versionName=1.0.3
+app.versionCode=4

lib/cpu_level_page.dart

@@ -26,7 +26,7 @@ class CpuLevelPage extends StatelessWidget {
                 '☺️ FACILE',
                 style: Theme.of(context)
                     .textTheme
-                    .display2
+                    .display1
                     .copyWith(color: Colors.black),
               ),
               onPressed: () {
@@ -48,7 +48,7 @@ class CpuLevelPage extends StatelessWidget {
                 '🤔 DIFFICILE',
                 style: Theme.of(context)
                     .textTheme
-                    .display2
+                    .display1
                     .copyWith(color: Colors.white),
               ),
               onPressed: () {
@@ -70,7 +70,7 @@ class CpuLevelPage extends StatelessWidget {
                 '🤯 TRES DIFFICILE',
                 style: Theme.of(context)
                     .textTheme
-                    .display2
+                    .display1
                     .copyWith(color: Colors.white),
               ),
               onPressed: () {

lib/home_page.dart

@@ -23,7 +23,7 @@ class HomePage extends StatelessWidget {
                 '🧑 2 JOUEURS 🧑',
                 style: Theme.of(context)
                     .textTheme
-                    .display2
+                    .display1
                     .copyWith(color: Colors.white),
               ),
               onPressed: () {
@@ -43,7 +43,7 @@ class HomePage extends StatelessWidget {
                 '🧑 1 JOUEUR 🤖',
                 style: Theme.of(context)
                     .textTheme
-                    .display2
+                    .display1
                     .copyWith(color: Colors.white),
               ),
               onPressed: () {
@@ -58,11 +58,12 @@ class HomePage extends StatelessWidget {
             ),
             FlatButton(
               color: Colors.white,
+              padding: EdgeInsets.all(15),
               child: Text(
-                'DEMO',
+                '🤖 DEMO 🤖',
                 style: Theme.of(context)
                     .textTheme
-                    .display2
+                    .display1
                     .copyWith(color: Colors.black),
               ),
               onPressed: () {

lib/main.dart

 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:puissance4/cpu_level_page.dart';
 import 'package:puissance4/home_page.dart';
 import 'package:puissance4/match_page.dart';
 
-void main() => runApp(MyApp());
+void main() {
+  WidgetsFlutterBinding.ensureInitialized();
+  SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp])
+      .then((value) => runApp(MyApp()));
+}
 
 class MyApp extends StatelessWidget {
   @override