UX expert for Apps needed who is skilled in Achievement, rewards and Certification

FluentWorlds is the world's first English language learning App in true 3D. The game contains 55 different Virtual Environments where users can learn up to 3000 words to achieve practical fluency in English in a Video Game like environment. We need a UI/UX expert to provide input and recommendations for App usage and certifications - we want to Certify that our Users have achieved certain levels of language training.