refactor: moved alien from board to pinball and fixed sprites

lib/game/components/board.dart

@@ -15,7 +15,6 @@ class Board extends Component {
     final bottomGroup = _BottomGroup();
 
     final flutterForest = FlutterForest();
-    final alienZone = AlienZone();
 
     // TODO(alestiago): adjust positioning to real design.
     final dino = ChromeDino()
@@ -28,7 +27,6 @@ class Board extends Component {
       bottomGroup,
       dino,
       flutterForest,
-      alienZone,
     ]);
   }
 }

lib/game/pinball_game.dart

@@ -46,6 +46,7 @@ class PinballGame extends Forge2DGame
     await add(plunger);
 
     unawaited(add(Board()));
+    unawaited(add(AlienZone()));
     unawaited(addFromBlueprint(Slingshots()));
     unawaited(addFromBlueprint(DinoWalls()));
     unawaited(_addBonusWord());

packages/pinball_components/lib/src/components/alien_bumper.dart

@@ -32,7 +32,6 @@ class AlienBumper extends BodyComponent with InitialPosition {
           spriteComponent: SpriteComponent(
             anchor: Anchor.center,
             position: Vector2(0, -0.1),
-            angle: 15.9 * math.pi / 180,
           ),
         );
 
@@ -46,7 +45,6 @@ class AlienBumper extends BodyComponent with InitialPosition {
           spriteComponent: SpriteComponent(
             anchor: Anchor.center,
             position: Vector2(0, -0.1),
-            angle: 15.9 * math.pi / 180,
           ),
         );
 
@@ -78,7 +76,7 @@ class AlienBumper extends BodyComponent with InitialPosition {
       center: Vector2.zero(),
       majorRadius: _majorRadius,
       minorRadius: _minorRadius,
-    )..rotate(math.pi / 1.9);
+    )..rotate(15.9 * math.pi / 180);
     final fixtureDef = FixtureDef(shape)
       ..friction = 0
       ..restitution = 4;

test/game/pinball_game_test.dart

@@ -62,6 +62,18 @@ void main() {
         );
       });
 
+      flameTester.test(
+        'one AlienZone',
+        (game) async {
+          final alienZone = AlienZone();
+          await game.ready();
+          await game.ensureAdd(alienZone);
+
+          final flutterForest = alienZone.descendants().whereType<AlienZone>();
+          expect(flutterForest.length, equals(1));
+        },
+      );
+
       group('controller', () {
         // TODO(alestiago): Write test to be controller agnostic.
         group('listenWhen', () {