Is it possible that the dev died ? I hope they're okay...
Luckily it's unlikely that anything like that happened since people have reported recent activity on Facebook and Steam, such as privating existing accounts. This all happened after she has been silent for a few years so it's looking like she just cut off everything game related and is pretending it never existed or something. I do know she's had problems with depression so I'm guessing that has something to do with everything, but at least physically they seem okay. I hope one day she feels well enough to return to this project or at least give us Kickstarter backers an explanation, refund or something, but I'm not holding my breath anymore. I really wish her the best and hope she is able to get the help she needs to recover from whatever is going on in her life.