iPhone Trivia app design

Hi! I have attached a the current scenes we have for the app. I would like to redesign the UI/UX to make it look and function better. You have complete creative freedom to design whatever you would like, however, all the components of the current app must be kept. Currently, on the menu page, the categories are in a list that is scrollable up and down (refer to files "[login to view URL]" and "[login to view URL]"). When the lock image is tapped, it will ask the user to purchase the category. There are 2 types of questions that are asked in the trivia app. Free answer and Multiple choice. The free answer questions have 1 answer that will be hidden and is revealed when tapped (refer to files "[login to view URL]" and "[login to view URL]"). The multiple choice questions will have 3 answers that are already revealed and 1 answer (the correct answer) which will be hidden and is revealed when tapped (refer to files "[login to view URL]" and "[login to view URL]") You may include notes on any kind of animations or ideas on how the screens should transition. This app will be available on all ios platforms and the design should have all appropriate sizes. Here is a reference for resolutions on the different iOS devices: [login to view URL] Please include examples of what your design will be so I can choose which design is best.