Sure, I didn't want to add too many links in the first post, but everything is linked from the one I provided :)
Yes, it is truly Free Software as it's a political thing with me. Almost all assets are Creative Commons, or a license with no restrictions. Only exception is some assets I bought out of desperation to avoid the game looking like garbage, but I managed by now to replace almost all of it. Once I find something for the rest, I plan to excise the rest, but everything is clearly marked.