Deus Novum is an HTML5/JS game that lets you take control of a Universe - manipulate time, space and physics to complete challenges.
Try it out online:
https://dwmkerr.github.io/deusnovum/
This is very much a basic work in progress and it's been years since I've worked on it! Feel free to play with it or experiment.
This is pure HTML/JS, there are no frameworks used.
When a change is pushed to the master branch the GitHub Pages site will automatically be updated.