Hello, how are you? I just got into a mood to do some coloring art. Here are my two samples. The first one I choose almost accidentally without concentrating much on my taste, though I like the shape of the boot.
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You would need to provide the sources of the images/art. Even if you coloured in in your own way.
Anything that does not belong to you (even if you modified it) needs to be sourced.
Then provide the source of that game.
Or google for another source since these images are in many places.
The readers must know that you are not the author of that art.
Once you source it correctly, I will give you a vote.