VickyKumarOfficial/Arcade-Learn ? reverse-engineered prompt

Build me a web app called Arcade Learn that feels like a fun place to learn coding by playing simple arcade style challenges.

I want a clean homepage, a place to browse lessons or challenges, and a way for users to work through small interactive exercises in the browser. It should have a polished modern look, work well on mobile, and include a basic backend so I can save progress or user data later.

If there are any missing details, make sensible choices and keep the app simple and easy to extend. Use the project files that are already here, wire everything together so it runs cleanly, and look up current docs online if you need to.