@stanfoo This is something I’ve considering since the beginning of SlickQuiz development. My goal with SlickQuiz has always been to keep it as simple as possible, and unfortunately, those sort of fill-in-the-blank type questions can get pretty complex, very quickly.
Because users could enter whatever they like, it can become very tricky to match what they entered with a correct response, or more likely what would have to be a collection of correct responses.
So at this time, I still don’t have plans on adding a feature like that to the plugin. I’ve always felt that a simple multiple choice question is a fine alternative. So hopefully that will also work for your needs.