idk from what i've seen, the mod on github is from a different person(WindsoFur and fpga). It works on a different principle too. It was made around the same time and last major update was yesterday(minor fixes 17 hours ago). No mention of this itch io page there. Only their own Kofi, started on version 0.1 and not 0.6 like yours. It's also open source.
Someone mentioned this itch mod in their thread in a discord server