I’m confused! So, there is http://www.frogatto.com/download, which makes it look like the game must be bought.
But then there is http://frogatto.com/devbuilds/, which has the game in it for free, even if these versions are ‘bleeding edge’.
Btw, I can’t get Anura compiling (Because Boost refuses to compile. But I think I know how to fix it.), and that’s how I stumbled on the second link.
EDIT: Also, will a game made with the unstable Frogatto engine probably fail to work with the stable version?