Interactive Quiz App for Teens

I need an engaging interactive quiz app targeting 12-14 year olds, available on both iOS and Android platforms. The app features 80 quiz questions divided into 8 sections, designed like levels. Users must answer all questions correctly before progressing to the next section. All questions are already written and can include text with images or text with animated videos.

Key Requirements:
- 80 quiz questions, 8 sections
- Level-based progression, 100% accuracy required before advancing
- Colorful and vibrant design
- Questions in text, image, or text with animated videos

Ideal Skills and Experience:
- Experience in mobile app development for both iOS and Android
- Proficiency in incorporating animated videos into apps
- Strong UI/UX design skills with a focus on colorful and vibrant aesthetics
- Background in quiz or educational app development is a plus

Would like to incorporate some basic interactive games throughout. Suggestions welcome.

Please provide samples of relevant work.