I don't really get how to browse Tumblr though I didn't immediately see any other of their works
Might be here, Tumblr is a bit of a dick so you can't browse without making an account. But this person was given credit one of the times that image was posted, so hopefully that's correct. They also have a red bubble under their previous Tumblr name and have the same image.
Nice to see usage of MRAH, it's how I say "yeah?" to my cats 😂