feat: pr suggestions

lib/game/bloc/game_bloc.dart

@@ -7,7 +7,7 @@ part 'game_state.dart';
 
 class GameBloc extends Bloc<GameEvent, GameState> {
   GameBloc({
-    int bonusLettersCount = 6,
+    int bonusLettersCount = 'GOOGLE'.length,
   })  : _bonusLettersCount = bonusLettersCount,
         super(const GameState.initial()) {
     on<BallLost>(_onBallLost);
@@ -38,7 +38,7 @@ class GameBloc extends Bloc<GameEvent, GameState> {
           activatedBonusLetters: [],
           bonusHistory: [
             ...state.bonusHistory,
-            GameBonus.letterSequence,
+            GameBonus.word,
           ],
         ),
       );

lib/game/bloc/game_state.dart

@@ -3,8 +3,8 @@ part of 'game_bloc.dart';
 /// Defines bonuses that a player can gain during a PinballGame.
 enum GameBonus {
   /// Bonus achieved when the user activate all of the bonus
-  /// letters on the board
-  letterSequence,
+  /// letters on the board, forming the bonus word
+  word,
 }
 
 /// {@template game_state}

test/game/bloc/game_bloc_test.dart

@@ -154,7 +154,7 @@ void main() {
             score: 0,
             balls: 3,
             activatedBonusLetters: [],
-            bonusHistory: [GameBonus.letterSequence],
+            bonusHistory: [GameBonus.word],
           ),
         ],
       );

test/game/bloc/game_state_test.dart

@@ -175,7 +175,7 @@ void main() {
             score: gameState.score + 1,
             balls: gameState.balls + 1,
             activatedBonusLetters: const [0],
-            bonusHistory: const [GameBonus.letterSequence],
+            bonusHistory: const [GameBonus.word],
           );
           expect(gameState, isNot(equals(otherGameState)));