Qcm app ui for medical students

We made this app for medical students to help them prepare for exams, it's called Medqcm and it allows you to start sessions in a kind of quiz manner.

students are able to create their own account which allows them to keep track of their preparation for exams, they can filter the MCQ's from different modules and different lessons and from different years, they can also take notes and have favourites. there's also a search engine for questions and much more...

I designed the UI to be both serious and fun, what do you guys think ?