Duplicate my survey-based website selecting only questions from one category

I currently have a survey-based website (puko[dot]it), please check it before submitting proposals. The questions flow on the main PLAY section is the following: - Play Landing Page: where the user starts the questions - Questions Page: 10 questions randomly selected from the entire database (there are 6 different question categories). The user does not see results for each question in this flow - Result Page: the user is prompted with predictions about his profile by comparing his answers and the answers of all the other users, as store in database. I NEED TO DUPLICATE THAT FLOW IN THIS WAY: 1) Copy the actual structure of puko. it/play and realize a folder [login to view URL] 2) The new landing page structure will be a copy of puko. it/play (I will take care of updating text and CTA) 3) When the user presses the button "GIOCA" in the new landing page a flow like puko. it/play will start 4) All the questions need to come from the specific category = quiz 5) As per puko. it/play, after any question, we will store data and we will not show results, but move to the next question. Close to the question counter I want to show a difficulty rate calculated as: 1 - [correct replies to this questions] / [total replies to this question] 6) After replying the 10 questions, in the Result Page with the same layout of puko. it/results I want to provide a final percentage score of how many were correct and compare this with all the users [all quiz questions will have at least a correct answer which is [login to view URL] = TRUE] Database Effects: 1) I need 2 temporary counters to calculate the share of right answers ([login to view URL]) 2) I need to create a new table (populated only when the user answers all the 10 questions) in order to rank users with the following fields: unique identifier created whenever a user press "GIOCA", user identifier (the same logic we have in puko play), the final score after a user replies, the number of correct answers. No big layout efforts are required, everything is almost a mere duplication. Budget: max $200. Do not post if you ask for more.