Thanks! Unfortunately it doesn’t work on HTML5 specifically, the culprit is the text renderer doing some things that don’t work on HTML5. If you need to use it there I could make a version that just uses the normal GameMaker text features, though (or you could replace all the scribble references yourself, if you’re comfortable doing that).
There aren’t any more features in mind that I plan on adding right now, although it’s possible that I might think of something I want to do eventually.