Finally, it works. I used the itch.io app though. Looking foward to having fun!
I updated my mac to OSX Sierra, and also power-cycled it, but this is what I get.
The app doesn't want to open for Mac (El Capitan 10.11.16). Every time I open it, it says
The application “ProjectTetraAlpha” can’t be opened.
The app is already unblocked.
