Hi siervicul,
Yes, most definitely! š I've added you as the author of those courses.
Let me know if you run into any issues or think of any improvements that would make your life easier. The editing experience on My Little Word Land works but has a lot of things that could probably be improved, I think š
By the way, if you'd like to import your progress from your Memrise courses, you can do so via this page: https://mylittlewordland.com/import-memrise-progress