Hello, I have not considered that, I think it's very possible with the current license, the game have a few external libraries and I need to check them one by one to make sure that something like that is possible... so why not? but I'm little lost with the jungle of licenses, I think GPL 3 allows commercial use of the content as long as the source is provided. if I do so there are already other people involved (you can see them in the credits) so you must take into account that there would be a few people involved that would have to get their part and that the source needs to be provided so that anyone can get the game for free anyway, so it would be almost like a donation or funds and an anknowldgement to the artist and developers than sells as I see it, correct me if I'm wrong.