Wow, this looks really, really nice! :)
Thank you very much for your work on this course! ^_^
This reminds me, too, that I was originally planning to make it so that My Little Word Land would automatically accept verbs either with "to" in front of them or without, so that the course authors wouldn't need to always put "to" in parentheses. That is, if the word or definition is "to sing", it'd be nice if the site automatically accepted both "sing" and "to sing". This would still requires authors to put "to" in front of each verb, but at least it wouldn't need to be in parentheses 🙂