I gave some thoughts about going open source, but I am not ready for this yet, plus I don't want any issue with the musician (Lapse) who did the musics. So no, not open source..
Thanks for replying to me on this subject. I can understand your reasons behind it now. You could remove the music some time in the future when you’re ready to release it as it’s more about the legacy of the game than the music for us that are interested in keeping it alive.