Copyright/Attribution Notice:
The Tune is public domain, so you can build upon it use it as a base or do anything you like with it for your own video games both commercial and non-commercial if you find a use for it except for one restriction, not to be used in adult material.
Comments
I'm not a lawyer, but I'm pretty sure you cannot impose that restriction with a CC0/Public Domain license. You can request it, but you cannot enforce it.
You could probably add a "no adult material" clause to CC-BY, CC-BY-SA, or a software license. It would have to be carefully worded to be effective. I'm not sure if this site allows additional stipulations or not.