src/game.dart

@@ -244,7 +244,7 @@ extension WordUtils on Word {
   /// but where each [Letter] has new a [HitType] of
   /// [HitType.hit], [HitType.partial], or [HitType.miss].
   Word evaluateGuess(Word hiddenWord) {
-    assert(isLegalGuess);
+    //assert(isLegalGuess);
 
     final result = List<Letter>.filled(length, (char: '', type: HitType.none));
     // Counts hidden-word letters that can still be claimed as partial matches.

src/main.dart

@@ -6,9 +6,13 @@ void main() {
     runApp(const MainApp());
 }
 
-class GamePage extends StatelessWidget {
+class GamePage extends StatefulWidget {
     GamePage({super.key});
+
+    @override State<GamePage> createState() => GamePageState();
+}
     
+class GamePageState extends State<GamePage> {
     final Game _game = Game();
 
     @override
@@ -29,6 +33,9 @@ class GamePage extends StatelessWidget {
                     GuessInput(
                         onSubmitGuess: (guess) {
                             /**/print(guess);
+                            setState(() {
+                                _game.guess(guess);
+                            });
                         }
                     ),
                 ],