I’m interested in adding this to my Libre Game Assets list.
Would you mind putting a formal license on it? The Free Software Foundation has a good explanation of why “informal licenses” are bad.
(For example, Germany errs on the side of protecting you from giving away too much when there’s ambiguity, to the point where things can get very surprising. This analysis of how far the CC0 has to go to achieve “like Public Domain” status in Germany has more detail on that.)