I would also suggest posting this in /r/javascript since it's likely to be seen by more people.
- I would suggest updating the codebase to use ES6 module conventions and use rollup for your build process over gulp+browserify
- Add a youtube-link that generates an appropriate embed option
- Add wrapper components for Angular, Vue and React
Aside: I'm not sure how much draw you will see for a "pro" version, but good luck to you.