This is pretty awesome news, a very promising HTML5 development environment for 2D & 3D games has become open source!
I've been wanting to cover it for a while, and it has been sat in my inbox for 11 days, woops.
I thought it would be a tool to allow drag & drop actions like Scirra's Construct or Clickteam's Fusion, but sadly you do still need to know programming to use it. Luckily Scirra's Construct 3 has plans for Linux support.
After testing it, it's certainly not something to pick-up easily, and don't expect to go into it and create something even as simple as a platformer without having some time to properly learn the ins and outs of it like any other IDE. It's a great idea though, being able to do it together, and that's the killer feature of it.
Superpowers is a downloadable HTML5 app. You can use it solo like a regular offline game maker, or setup a password and let friends join in on your project through their Web browser. It's great for working together over long periods of time, for jamming over a weekend, or just for helping each other out with debugging!
You can find it on github here, and here's the official website.
They are entirely funded by Patreon now it seems. Interesting to see more and more projects use it.
About the author - Liam Dawe