Các features, scenarios:

      Feature: Vocabulary
          In order to try my English
          As an user
          I want to play "Thử tài tiếng Anh"

         Scenario: Choose the topic
            Given list of topic
            When I click "Relationship"
            Then I should be on "/2.php"
         Scenario: Start game
            Given two buttons "Start Game" and "Back"
            When I click "Start Game"
            Then I should see the question
            When I click "Back"
            Then I should be on "/index.php"
         Scenario: Play game
            Given a question
            When I choose right answer
            Then I should see the next question
            When I choose wrong question
            Then I should see my score
         Scenario: Game Over
            Given two buttons "Play again" and "Menu"
            When I click "Play again"
            Then I should be given a question
            When I click "Menu"
            Then I should be on "/index.php"