Download of Superpowers 6.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of this free Mac application is Sparklinlabs. The software lies within Developer Tools, more precisely Webmaster Tools.
From the developer:
Superpowers is a free app that allows you to create 2D and 3D games. Built with Web technologies, Superpowers core provides an extensible infrastructure for all kinds of collaborative tools. Using HTML5, CSS and JS. Even the built-in tools are just plugins you can replace.
You may want to check out more Mac applications, such as Angry Birds Space, SpandexForce or Constitution for Mac, which might be related to Superpowers.