Make the game board its own widget.

lib/main.dart

@@ -9,9 +9,16 @@ class MainApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return const MaterialApp(
-      home: Scaffold(
-        body: Row(
+    return const MaterialApp(home: Scaffold(body: GameBoard()));
+  }
+}
+
+class GameBoard extends StatelessWidget {
+  const GameBoard({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
       mainAxisAlignment: MainAxisAlignment.spaceEvenly,
       crossAxisAlignment: CrossAxisAlignment.stretch,
       children: [
@@ -52,8 +59,6 @@ class MainApp extends StatelessWidget {
         // Player 2 Goal
         Column(children: [Center(child: Text(" P2 "))]),
       ],
-        ),
-      ),
     );
   }
 }