What kind of copyright do you put in your creation? All these painting in real life are public doming, but yours are, well... undefined here. CC1-3? Commercial/no commercial?
Great job by the way :D
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I'd like to use these assets in a FOSS Minetest mod, but the license is still unclear since there is no such thing as "CC1". Based on "you can use it for whatever you want, commercial or noncommercial" I think you meant CC-BY-1.0, CC-BY-SA-1.0 (both allow commercial use), or possibly CC0-1.0 if you don't require credit. Could you clarify? If it's CC-BY-1.0 or CC-BY-SA-1.0, upgrading to a later version such as CC-BY-4.0 or CC-BY-SA-4.0 could also be a good idea: the license was greatly improved since the first version. The creative commons website has a nice license chooser.