Hello, I just saw the itch.io tool a while ago and was wondering to check the documentation before starting a game. But it seems like everything is off? The websites doesn't answer...
(128 days later I look my notifications)
Well Well, the team stopped working on the engine some years ago but if you still want to take a try you need to go on github documentation:
https://github.com/superpowers/docs.superpowers-html5.com/tree/master/pages/en