I recently found classcraft and i really like it! It’s just one thing that bothers some of my students and parents and it’s due to the fact you can only use traditional Chinese character which is only used in Taiwan and Hong Kong. My students can still read it well enough to get by, but I think you should consider doing a version in mandarin. Just think of all the people you could reach out to!
Anyways, just a suggestion.
Cheers, and great job!