Ruby and other resources

pages/css/index.vue

@@ -28,6 +28,11 @@ export default {
           desc: 'A game to learn Flexbox',
           url: 'https://flexboxfroggy.com'
         },
+        {
+          title: 'Flexbox Zombies',
+          desc: 'A course to learn Flexbox',
+          url: 'https://mastery.games/p/flexbox-zombies'
+        },
         {
           title: 'CSS Gridgarden',
           desc: 'A game to learn Grid',