patreon probably, i dont have a link so you will have to find it on your own, hope this helps
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Well dev was banned on patreon probably for content, and he moved on other site. That was more that 2 years ago. Anyway best content was in demo, so its not like you miss much if you wont find last version of this game (on other hand i had my last version from panteon, and i dont remember if itch and steam demo have the same content).