Use transparent header for game

src/navigation/MainNavigator.js

@@ -98,6 +98,9 @@ function MainStackComponent(props: {
         MainStack,
         GameStartScreen,
         i18n.t('screens.game.title'),
+        true,
+        null,
+        'transparent',
       )}
       <MainStack.Screen
         name="game-main"

src/screens/Game/screens/GameStartScreen.js

@@ -384,6 +384,7 @@ class GameStartScreen extends React.Component<PropsType> {
   recoverGameScore() {
     const {route} = this.props;
     this.gameStats = route.params;
+    if (this.gameStats.score != null) {
       this.isHighScore =
         this.scores.length === 0 || this.gameStats.score > this.scores[0];
       for (let i = 0; i < 3; i += 1) {
@@ -401,6 +402,7 @@ class GameStartScreen extends React.Component<PropsType> {
         this.scores,
       );
     }
+  }
 
   render(): React.Node {
     const {props} = this;