Change a quiz app into a learning car quiz

So we need an app for getting started for android car questionnaires. The bugget is low because u can use a source code from codecanyon a quiz app and modify from there. As a reference the app how to be : [login to view URL] the source code from codecanyon : [login to view URL] at the base of the reference app is this source code. The modification need to be : 1. Go directly to the main app , to be without registration 2. The rewards sistem to be disable 3. when a user hit skip question to be add for later in questionare , to move to the end of the quiz to answer 4. 50/50 remove 5. the user when hit a answer to have the posibily before hit next to modify the answer and not to show if is wrong or right, only after the user hit next to have in header of the app how much question remain , how much question is wrong, like the demo i send 6. the questions in category will be random generated but some categoryes when the user have 5 answers wrong the test will be terminated, in some categoryes at 3 answer wrong test will be terminated 7. at the end to have explanation for the answers after she wacth a reward video ( maybe is posibile to modify in the review section to be add the explanation of the question from the hit field ) 8. time to be per total of the questionare not individual question [login to view URL],pushnotification to remain the same (the other features) (the same features like the demo app).