I know you guys are working on ironing things out right now, but just wanted to point this out in case you haven’t seen it yet:
Some words in the lessons appear to be grayish instead of black, with no blue highlight, and when I click on them, I don’t get hints or any responses. Some of these are unknown words to me – I don’t know if some of them are in my known category or not. The color difference is very subtle, but the words in question are a shade or two lighter than the rest of the words in the lesson.