interesting, i had not bothered to look at licenses as i was not intending to have any restriction but that is good to know, thank you.
with that said yes i believe that would be a CC0 licesnce.
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If you think that it was useful for you, you can leave a comment here to support my proposal about making metadata more visible for those who are interested in it https://itch.io/t/2919128/metadata-encouragement#post-7952450