This is super cool, thank you for building it! Two small UX ideas: - a scrollbar and search for the Online Library would be helpful - switching difficulty lev

This is super cool, thank you for building it! Two small UX ideas: - a scrollbar and search for the Online Library would be helpful - switching difficulty levels in the middle of reading could be helpful. Or if you keep that on a separate page, returning automatically to the last open position. (I was floating between beginner levels to find the right amount of challenge)