Community Copies are a bit of a roundabout process to set up. The info is buried in this tutorial about rewards: https://itch.io/docs/creators/exclusive-content
Everyone should always feel free to grab community copies of any of my stuff. The only reason my mid-length games currently have a pricetag at all is so that I can try to get a sense of if/how fast they're moving---although if I can recoup art expenses on them, that makes the model self-sustaining, and that's good too.
As for Dusk Sequence's inspiration, I didn't set out to make Are You Afraid Of The Dark the trpg, I sort of just started from the title and worked backwards. And then like a month after I'd finished the draft, the (really unbelievably good) new miniseries aired.