diff --git a/.github/workflows/geometry.yaml b/.github/workflows/geometry.yaml
new file mode 100644
index 00000000..8bf55107
--- /dev/null
+++ b/.github/workflows/geometry.yaml
@@ -0,0 +1,18 @@
+name: geometry
+
+on:
+  push:
+    paths:
+      - "packages/geometry/**"
+      - ".github/workflows/geometry.yaml"
+
+  pull_request:
+    paths:
+      - "packages/geometry/**"
+      - ".github/workflows/geometry.yaml"
+
+jobs:
+  build:
+    uses: VeryGoodOpenSource/very_good_workflows/.github/workflows/dart_package.yml@v1
+    with:
+      working_directory: packages/geometry
diff --git a/lib/game/components/score_points.dart b/lib/game/components/score_points.dart
index c6474b16..b4ad1bdf 100644
--- a/lib/game/components/score_points.dart
+++ b/lib/game/components/score_points.dart
@@ -22,9 +22,4 @@ class BallScorePointsCallback extends ContactCallback<Ball, ScorePoints> {
   ) {
     ball.gameRef.read<GameBloc>().add(Scored(points: scorePoints.points));
   }
-
-  // TODO(alestiago): remove once this issue is closed.
-  // https://github.com/flame-engine/flame/issues/1414
-  @override
-  void end(Ball _, ScorePoints __, Contact ___) {}
 }
diff --git a/lib/game/components/wall.dart b/lib/game/components/wall.dart
index 762d404e..c433365c 100644
--- a/lib/game/components/wall.dart
+++ b/lib/game/components/wall.dart
@@ -77,7 +77,4 @@ class BottomWallBallContactCallback extends ContactCallback<Ball, BottomWall> {
   void begin(Ball ball, BottomWall wall, Contact contact) {
     ball.lost();
   }
-
-  @override
-  void end(_, __, ___) {}
 }
diff --git a/packages/geometry/lib/src/geometry.dart b/packages/geometry/lib/src/geometry.dart
index dceb4e9e..6ada92e0 100644
--- a/packages/geometry/lib/src/geometry.dart
+++ b/packages/geometry/lib/src/geometry.dart
@@ -1,5 +1,6 @@
 import 'dart:math' as math;
-import 'package:flame/extensions.dart';
+
+import 'package:vector_math/vector_math_64.dart';
 
 /// Calculates all [Vector2]s of a circumference.
 ///
diff --git a/packages/geometry/pubspec.yaml b/packages/geometry/pubspec.yaml
index 2678cdef..8fffb8b3 100644
--- a/packages/geometry/pubspec.yaml
+++ b/packages/geometry/pubspec.yaml
@@ -7,13 +7,9 @@ environment:
   sdk: ">=2.16.0 <3.0.0"
 
 dependencies: 
-  flame: ^1.0.0
-  flutter:
-    sdk: flutter
+  vector_math: ^2.1.1
 
 dev_dependencies:
-  flutter_test:
-    sdk: flutter
   mocktail: ^0.2.0
   test: ^1.19.2
   very_good_analysis: ^2.4.0
diff --git a/packages/geometry/test/src/geometry_test.dart b/packages/geometry/test/src/geometry_test.dart
index a3040a9c..2a5f9169 100644
--- a/packages/geometry/test/src/geometry_test.dart
+++ b/packages/geometry/test/src/geometry_test.dart
@@ -1,7 +1,8 @@
 // ignore_for_file: prefer_const_constructors, cascade_invocations
-import 'package:flame/extensions.dart';
-import 'package:flutter_test/flutter_test.dart';
+
 import 'package:geometry/geometry.dart';
+import 'package:test/test.dart';
+import 'package:vector_math/vector_math_64.dart';
 
 class Binomial {
   Binomial({required this.n, required this.k});
@@ -42,18 +43,18 @@ void main() {
           ],
           step: 2,
         ),
-        throwsAssertionError,
+        throwsA(isA<AssertionError>()),
       );
     });
 
     test('fails if not enough control points', () {
       expect(
         () => calculateBezierCurve(controlPoints: [Vector2.zero()]),
-        throwsAssertionError,
+        throwsA(isA<AssertionError>()),
       );
       expect(
         () => calculateBezierCurve(controlPoints: []),
-        throwsAssertionError,
+        throwsA(isA<AssertionError>()),
       );
     });
 
@@ -81,15 +82,24 @@ void main() {
 
   group('binomial', () {
     test('fails if k is negative', () {
-      expect(() => binomial(1, -1), throwsAssertionError);
+      expect(
+        () => binomial(1, -1),
+        throwsA(isA<AssertionError>()),
+      );
     });
 
     test('fails if n is negative', () {
-      expect(() => binomial(-1, 1), throwsAssertionError);
+      expect(
+        () => binomial(-1, 1),
+        throwsA(isA<AssertionError>()),
+      );
     });
 
     test('fails if n < k', () {
-      expect(() => binomial(1, 2), throwsAssertionError);
+      expect(
+        () => binomial(1, 2),
+        throwsA(isA<AssertionError>()),
+      );
     });
 
     test('for a specific input gives a correct value', () {
@@ -131,7 +141,7 @@ void main() {
 
   group('factorial', () {
     test('fails if negative number', () {
-      expect(() => factorial(-1), throwsAssertionError);
+      expect(() => factorial(-1), throwsA(isA<AssertionError>()));
     });
 
     test('for a specific input gives a correct value', () {
diff --git a/test/game/components/anchor_test.dart b/test/game/components/anchor_test.dart
index e0cfd645..49721947 100644
--- a/test/game/components/anchor_test.dart
+++ b/test/game/components/anchor_test.dart
@@ -11,7 +11,7 @@ void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
 
   group('Anchor', () {
-    final flameTester = FlameTester(PinballGameX.initial);
+    final flameTester = FlameTester(PinballGameTest.create);
 
     flameTester.test(
       'loads correctly',
diff --git a/test/game/components/ball_test.dart b/test/game/components/ball_test.dart
index fca6b24a..2fb80605 100644
--- a/test/game/components/ball_test.dart
+++ b/test/game/components/ball_test.dart
@@ -13,7 +13,7 @@ void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
 
   group('Ball', () {
-    final flameTester = FlameTester(PinballGameX.initial);
+    final flameTester = FlameTester(PinballGameTest.create);
 
     flameTester.test(
       'loads correctly',
diff --git a/test/game/components/flipper_test.dart b/test/game/components/flipper_test.dart
index ad608447..2a92f082 100644
--- a/test/game/components/flipper_test.dart
+++ b/test/game/components/flipper_test.dart
@@ -12,7 +12,7 @@ import '../../helpers/helpers.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
-  final flameTester = FlameTester(PinballGameX.initial);
+  final flameTester = FlameTester(PinballGameTest.create);
   group(
     'Flipper',
     () {
diff --git a/test/game/components/pathway_test.dart b/test/game/components/pathway_test.dart
index 482f6d57..43af9b77 100644
--- a/test/game/components/pathway_test.dart
+++ b/test/game/components/pathway_test.dart
@@ -10,7 +10,7 @@ import '../../helpers/helpers.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
-  final flameTester = FlameTester(PinballGameX.initial);
+  final flameTester = FlameTester(PinballGameTest.create);
 
   group('Pathway', () {
     const width = 50.0;
diff --git a/test/game/components/plunger_test.dart b/test/game/components/plunger_test.dart
index 0ed550b2..02330b31 100644
--- a/test/game/components/plunger_test.dart
+++ b/test/game/components/plunger_test.dart
@@ -13,7 +13,7 @@ import '../../helpers/helpers.dart';
 
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
-  final flameTester = FlameTester(PinballGameX.initial);
+  final flameTester = FlameTester(PinballGameTest.create);
 
   group('Plunger', () {
     const compressionDistance = 0.0;
diff --git a/test/game/components/wall_test.dart b/test/game/components/wall_test.dart
index a45d0057..e60046ad 100644
--- a/test/game/components/wall_test.dart
+++ b/test/game/components/wall_test.dart
@@ -32,7 +32,7 @@ void main() {
         },
       );
     });
-    final flameTester = FlameTester(PinballGameX.initial);
+    final flameTester = FlameTester(PinballGameTest.create);
 
     flameTester.test(
       'loads correctly',
diff --git a/test/game/pinball_game_test.dart b/test/game/pinball_game_test.dart
index 3e3002cb..ef1a188e 100644
--- a/test/game/pinball_game_test.dart
+++ b/test/game/pinball_game_test.dart
@@ -10,7 +10,7 @@ import '../helpers/helpers.dart';
 void main() {
   group('PinballGame', () {
     TestWidgetsFlutterBinding.ensureInitialized();
-    final flameTester = FlameTester(PinballGameX.initial);
+    final flameTester = FlameTester(PinballGameTest.create);
 
     // TODO(alestiago): test if [PinballGame] registers
     // [BallScorePointsCallback] once the following issue is resolved:
diff --git a/test/helpers/builders.dart b/test/helpers/builders.dart
index 8ae3c546..c77e55c5 100644
--- a/test/helpers/builders.dart
+++ b/test/helpers/builders.dart
@@ -1,13 +1,14 @@
 import 'package:flame_test/flame_test.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:pinball/game/game.dart';
-import 'package:pinball_theme/pinball_theme.dart';
+
+import 'helpers.dart';
 
 FlameTester<PinballGame> flameBlocTester({
   required GameBloc gameBloc,
 }) {
   return FlameTester<PinballGame>(
-    PinballGameX.initial,
+    PinballGameTest.create,
     pumpWidget: (gameWidget, tester) async {
       await tester.pumpWidget(
         BlocProvider.value(
@@ -18,11 +19,3 @@ FlameTester<PinballGame> flameBlocTester({
     },
   );
 }
-
-extension PinballGameX on PinballGame {
-  static PinballGame initial() => PinballGame(
-        theme: const PinballTheme(
-          characterTheme: DashTheme(),
-        ),
-      );
-}
diff --git a/test/helpers/extensions.dart b/test/helpers/extensions.dart
new file mode 100644
index 00000000..a976abd9
--- /dev/null
+++ b/test/helpers/extensions.dart
@@ -0,0 +1,12 @@
+import 'package:pinball/game/game.dart';
+import 'package:pinball_theme/pinball_theme.dart';
+
+/// [PinballGame] extension to reduce boilerplate in tests.
+extension PinballGameTest on PinballGame {
+  /// Create [PinballGame] with default [PinballTheme].
+  static PinballGame create() => PinballGame(
+        theme: const PinballTheme(
+          characterTheme: DashTheme(),
+        ),
+      );
+}
diff --git a/test/helpers/helpers.dart b/test/helpers/helpers.dart
index c2c1cd36..88b9c04d 100644
--- a/test/helpers/helpers.dart
+++ b/test/helpers/helpers.dart
@@ -1,11 +1,11 @@
-// Copyright (c) 2021, Very Good Ventures
-// https://verygood.ventures
 //
+// Copyright (c) 2021, Very Good Ventures
 // Use of this source code is governed by an MIT-style
-// license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
-
+// https://verygood.ventures
+// license that can be found in the LICENSE file or at
 export 'builders.dart';
+export 'extensions.dart';
 export 'key_testers.dart';
 export 'mocks.dart';
 export 'pump_app.dart';