refactor: use rounds instead of balls

lib/game/view/widgets/round_count_display.dart

@@ -14,9 +14,7 @@ class RoundCountDisplay extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final l10n = context.l10n;
-    // TODO(arturplaczek): refactor when GameState handle balls and rounds and
-    // select state.rounds property instead of state.ball
-    final balls = context.select((GameBloc bloc) => bloc.state.balls);
+    final balls = context.select((GameBloc bloc) => bloc.state.rounds);
 
     return Row(
       children: [

test/game/view/widgets/game_hud_test.dart

@@ -18,7 +18,9 @@ void main() {
 
     const initialState = GameState(
       score: 1000,
+      multiplier: 1,
       balls: 2,
+      rounds: 1,
       bonusHistory: [],
     );
 

test/game/view/widgets/round_count_display_test.dart

@@ -11,7 +11,9 @@ void main() {
     late GameBloc gameBloc;
     const initialState = GameState(
       score: 0,
-      balls: 3,
+      multiplier: 1,
+      balls: 1,
+      rounds: 3,
       bonusHistory: [],
     );
 
@@ -37,7 +39,7 @@ void main() {
 
     testWidgets('two active round indicator', (tester) async {
       final state = initialState.copyWith(
-        balls: 2,
+        rounds: 2,
       );
       whenListen(
         gameBloc,
@@ -68,7 +70,7 @@ void main() {
 
     testWidgets('one active round indicator', (tester) async {
       final state = initialState.copyWith(
-        balls: 1,
+        rounds: 1,
       );
       whenListen(
         gameBloc,

test/game/view/widgets/score_view_test.dart

@@ -15,7 +15,9 @@ void main() {
   const score = 123456789;
   const initialState = GameState(
     score: score,
+    multiplier: 1,
     balls: 1,
+    rounds: 1,
     bonusHistory: [],
   );
 
@@ -46,7 +48,7 @@ void main() {
 
       stateController.add(
         initialState.copyWith(
-          balls: 0,
+          rounds: 0,
         ),
       );