It runs on M1 macs, but you have some work to do, as the old version of RPGM MV on which this game is based just isn't compatible.
I downloaded the latest version of nwjs (nwjs-v0.67.0-osx-x64.zip) from
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Then I copied the app.nw folder from /Contents/Resources over to the corresponding location inside the 0.67 nwjs app. (right click the app, show package contents)
As usual, I removed all instances of com.apple.quarantine that were imposed by Gatekeeper from all files with
xattr in Terminal.