diff --git a/lib/game/bloc/game_bloc.dart b/lib/game/bloc/game_bloc.dart
index 3cfc521f..3b5c16b0 100644
--- a/lib/game/bloc/game_bloc.dart
+++ b/lib/game/bloc/game_bloc.dart
@@ -27,8 +27,8 @@ class GameBloc extends Bloc<GameEvent, GameState> {
   void _onBonusLetterActivated(BonusLetterActivated event, Emitter emit) {
     emit(
       state.copyWith(
-        bonusLetter: [
-          ...state.bonusLetter,
+        bonusLetters: [
+          ...state.bonusLetters,
           event.letter,
         ],
       ),
diff --git a/lib/game/bloc/game_state.dart b/lib/game/bloc/game_state.dart
index 09207b86..8a5ab298 100644
--- a/lib/game/bloc/game_state.dart
+++ b/lib/game/bloc/game_state.dart
@@ -8,14 +8,14 @@ class GameState extends Equatable {
   const GameState({
     required this.score,
     required this.balls,
-    required this.bonusLetter,
+    required this.bonusLetters,
   })  : assert(score >= 0, "Score can't be negative"),
         assert(balls >= 0, "Number of balls can't be negative");
 
   const GameState.initial()
       : score = 0,
         balls = 3,
-        bonusLetter = const [];
+        bonusLetters = const [];
 
   /// The current score of the game.
   final int score;
@@ -26,7 +26,7 @@ class GameState extends Equatable {
   final int balls;
 
   /// Active bonus letters.
-  final List<String> bonusLetter;
+  final List<String> bonusLetters;
 
   /// Determines when the game is over.
   bool get isGameOver => balls == 0;
@@ -37,7 +37,7 @@ class GameState extends Equatable {
   GameState copyWith({
     int? score,
     int? balls,
-    List<String>? bonusLetter,
+    List<String>? bonusLetters,
   }) {
     assert(
       score == null || score >= this.score,
@@ -47,7 +47,7 @@ class GameState extends Equatable {
     return GameState(
       score: score ?? this.score,
       balls: balls ?? this.balls,
-      bonusLetter: bonusLetter ?? this.bonusLetter,
+      bonusLetters: bonusLetters ?? this.bonusLetters,
     );
   }
 
@@ -55,6 +55,6 @@ class GameState extends Equatable {
   List<Object?> get props => [
         score,
         balls,
-        bonusLetter,
+        bonusLetters,
       ];
 }
diff --git a/test/game/bloc/game_bloc_test.dart b/test/game/bloc/game_bloc_test.dart
index 3dc5dda7..bd669397 100644
--- a/test/game/bloc/game_bloc_test.dart
+++ b/test/game/bloc/game_bloc_test.dart
@@ -21,9 +21,9 @@ void main() {
           }
         },
         expect: () => [
-          const GameState(score: 0, balls: 2, bonusLetter: []),
-          const GameState(score: 0, balls: 1, bonusLetter: []),
-          const GameState(score: 0, balls: 0, bonusLetter: []),
+          const GameState(score: 0, balls: 2, bonusLetters: []),
+          const GameState(score: 0, balls: 1, bonusLetters: []),
+          const GameState(score: 0, balls: 0, bonusLetters: []),
         ],
       );
     });
@@ -37,8 +37,8 @@ void main() {
           ..add(const Scored(points: 2))
           ..add(const Scored(points: 3)),
         expect: () => [
-          const GameState(score: 2, balls: 3, bonusLetter: []),
-          const GameState(score: 5, balls: 3, bonusLetter: []),
+          const GameState(score: 2, balls: 3, bonusLetters: []),
+          const GameState(score: 5, balls: 3, bonusLetters: []),
         ],
       );
 
@@ -53,9 +53,9 @@ void main() {
           bloc.add(const Scored(points: 2));
         },
         expect: () => [
-          const GameState(score: 0, balls: 2, bonusLetter: []),
-          const GameState(score: 0, balls: 1, bonusLetter: []),
-          const GameState(score: 0, balls: 0, bonusLetter: []),
+          const GameState(score: 0, balls: 2, bonusLetters: []),
+          const GameState(score: 0, balls: 1, bonusLetters: []),
+          const GameState(score: 0, balls: 0, bonusLetters: []),
         ],
       );
     });
@@ -75,32 +75,32 @@ void main() {
           const GameState(
             score: 0,
             balls: 3,
-            bonusLetter: ['G'],
+            bonusLetters: ['G'],
           ),
           const GameState(
             score: 0,
             balls: 3,
-            bonusLetter: ['G', 'O'],
+            bonusLetters: ['G', 'O'],
           ),
           const GameState(
             score: 0,
             balls: 3,
-            bonusLetter: ['G', 'O', 'O'],
+            bonusLetters: ['G', 'O', 'O'],
           ),
           const GameState(
             score: 0,
             balls: 3,
-            bonusLetter: ['G', 'O', 'O', 'G'],
+            bonusLetters: ['G', 'O', 'O', 'G'],
           ),
           const GameState(
             score: 0,
             balls: 3,
-            bonusLetter: ['G', 'O', 'O', 'G', 'L'],
+            bonusLetters: ['G', 'O', 'O', 'G', 'L'],
           ),
           const GameState(
             score: 0,
             balls: 3,
-            bonusLetter: ['G', 'O', 'O', 'G', 'L', 'E'],
+            bonusLetters: ['G', 'O', 'O', 'G', 'L', 'E'],
           ),
         ],
       );
diff --git a/test/game/bloc/game_state_test.dart b/test/game/bloc/game_state_test.dart
index e50acbcd..7345d3bd 100644
--- a/test/game/bloc/game_state_test.dart
+++ b/test/game/bloc/game_state_test.dart
@@ -10,13 +10,13 @@ void main() {
         GameState(
           score: 0,
           balls: 0,
-          bonusLetter: const [],
+          bonusLetters: const [],
         ),
         equals(
           const GameState(
             score: 0,
             balls: 0,
-            bonusLetter: [],
+            bonusLetters: [],
           ),
         ),
       );
@@ -24,7 +24,10 @@ void main() {
 
     group('constructor', () {
       test('can be instantiated', () {
-        expect(const GameState(score: 0, balls: 0, bonusLetter: []), isNotNull);
+        expect(
+          const GameState(score: 0, balls: 0, bonusLetters: []),
+          isNotNull,
+        );
       });
     });
 
@@ -33,7 +36,7 @@ void main() {
       'when balls are negative',
       () {
         expect(
-          () => GameState(balls: -1, score: 0, bonusLetter: const []),
+          () => GameState(balls: -1, score: 0, bonusLetters: const []),
           throwsAssertionError,
         );
       },
@@ -44,7 +47,7 @@ void main() {
       'when score is negative',
       () {
         expect(
-          () => GameState(balls: 0, score: -1, bonusLetter: const []),
+          () => GameState(balls: 0, score: -1, bonusLetters: const []),
           throwsAssertionError,
         );
       },
@@ -57,7 +60,7 @@ void main() {
         const gameState = GameState(
           balls: 0,
           score: 0,
-          bonusLetter: [],
+          bonusLetters: [],
         );
         expect(gameState.isGameOver, isTrue);
       });
@@ -68,7 +71,7 @@ void main() {
         const gameState = GameState(
           balls: 1,
           score: 0,
-          bonusLetter: [],
+          bonusLetters: [],
         );
         expect(gameState.isGameOver, isFalse);
       });
@@ -82,7 +85,7 @@ void main() {
           const gameState = GameState(
             balls: 1,
             score: 0,
-            bonusLetter: [],
+            bonusLetters: [],
           );
           expect(gameState.isLastBall, isTrue);
         },
@@ -95,7 +98,7 @@ void main() {
           const gameState = GameState(
             balls: 2,
             score: 0,
-            bonusLetter: [],
+            bonusLetters: [],
           );
           expect(gameState.isLastBall, isFalse);
         },
@@ -110,7 +113,7 @@ void main() {
           const gameState = GameState(
             balls: 0,
             score: 2,
-            bonusLetter: [],
+            bonusLetters: [],
           );
           expect(
             () => gameState.copyWith(score: gameState.score - 1),
@@ -126,7 +129,7 @@ void main() {
           const gameState = GameState(
             balls: 0,
             score: 2,
-            bonusLetter: [],
+            bonusLetters: [],
           );
           expect(
             gameState.copyWith(),
@@ -142,12 +145,12 @@ void main() {
           const gameState = GameState(
             score: 2,
             balls: 0,
-            bonusLetter: [],
+            bonusLetters: [],
           );
           final otherGameState = GameState(
             score: gameState.score + 1,
             balls: gameState.balls + 1,
-            bonusLetter: const ['A'],
+            bonusLetters: const ['A'],
           );
           expect(gameState, isNot(equals(otherGameState)));
 
@@ -155,7 +158,7 @@ void main() {
             gameState.copyWith(
               score: otherGameState.score,
               balls: otherGameState.balls,
-              bonusLetter: otherGameState.bonusLetter,
+              bonusLetters: otherGameState.bonusLetters,
             ),
             equals(otherGameState),
           );
diff --git a/test/game/components/ball_test.dart b/test/game/components/ball_test.dart
index 9885b310..bd2cbcfc 100644
--- a/test/game/components/ball_test.dart
+++ b/test/game/components/ball_test.dart
@@ -135,7 +135,11 @@ void main() {
           whenListen(
             gameBloc,
             const Stream<GameState>.empty(),
-            initialState: const GameState(score: 10, balls: 1, bonusLetter: []),
+            initialState: const GameState(
+              score: 10,
+              balls: 1,
+              bonusLetters: [],
+            ),
           );
           await game.ready();
 
diff --git a/test/game/view/pinball_game_page_test.dart b/test/game/view/pinball_game_page_test.dart
index eacee734..d578a1db 100644
--- a/test/game/view/pinball_game_page_test.dart
+++ b/test/game/view/pinball_game_page_test.dart
@@ -67,7 +67,7 @@ void main() {
       'renders a game over dialog when the user has lost',
       (tester) async {
         final gameBloc = MockGameBloc();
-        const state = GameState(score: 0, balls: 0, bonusLetter: []);
+        const state = GameState(score: 0, balls: 0, bonusLetters: []);
         whenListen(
           gameBloc,
           Stream.value(state),