It turns out that its no longer available on DTRPG. Is OpenBasic under an open license?
Viewing post in Open Basic: JdR rétro d100 comments
Yes the text is under the OGL (the art is not, and I think the title is "trademarked" or something like that)
I guess you can ask the author about the game ; I've discussed with him through facebook : https://www.facebook.com/jdrakeh
The guy is also on Twitter IIRC.