I've been helping out /r/touhou on /r/place with an improved sprite reference image and tooling.pic.twitter.com/iP5LkJvBz8
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In your case it's easier since your art is simpler and bad pixels stand off more, but if you want I can share the (ugly) scripts.
https://mrcn.st/t/r_place_scripts.tar.gz … If you're interested. You need to replace the included images and change the coordinates/sizes.
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