feat: add support for specific platforms in flame_game

e2e/test/commands/create/flame_game/flame_game_test.dart

@@ -51,7 +51,7 @@ void main() {
         ['coverage/lcov.info', '-o', 'coverage'],
         workingDirectory: workingDirectory,
       );
-      expect(testCoverageResult.stdout, contains('lines......: 97.8%'));
+      expect(testCoverageResult.stdout, matches(RegExp('lines(.+) 100.0%')));
     }),
   );
 }

lib/src/commands/create/commands/flame_game.dart

@@ -10,7 +10,23 @@ class CreateFlameGame extends CreateSubCommand with OrgName {
     required super.logger,
     required super.generatorFromBundle,
     required super.generatorFromBrick,
-  });
+  }) {
+    argParser.addMultiOption(
+      'platforms',
+      help:
+          'The platforms supported by the game. By default, all platforms '
+          'are enabled. Example: --platforms=android,ios',
+      defaultsTo: ['android', 'ios', 'web', 'macos', 'windows'],
+      allowed: ['android', 'ios', 'web', 'macos', 'windows'],
+      allowedHelp: {
+        'android': 'The game supports the Android platform.',
+        'ios': 'The game supports the iOS platform.',
+        'web': 'The game supports the Web platform.',
+        'macos': 'The game supports the macOS platform.',
+        'windows': 'The game supports the Windows platform.',
+      },
+    );
+  }
 
   @override
   String get name => 'flame_game';
@@ -20,4 +36,15 @@ class CreateFlameGame extends CreateSubCommand with OrgName {
 
   @override
   Template get template => VeryGoodFlameGameTemplate();
+
+  @override
+  Map<String, dynamic> getTemplateVars() {
+    final vars = super.getTemplateVars();
+
+    final platforms = argResults['platforms'] as List<String>;
+
+    vars['platforms'] = platforms;
+
+    return vars;
+  }
 }