I worked on a quick adaptation so Signum can be launched for both windows and mac.
I thought about releasing the game on steam greenlight, but sincerely I want to make some more games until I find the one that could make it to the big leagues.
Meanwhile I discovered Itch.io an indie platform for indie games/software. Its a really robust platform with many options, you can have a customized landing page and choose the percentage that Itch.io gets when someone buys your game. Also you can make your game free with an optional payment and receive donations.
Finally here you can download Signum, or if you want to know more about it visit its Itch.io page.