Angel is way too cute, I would join the cult in an heartbeat.
As this is only a demo it hard to evaluate but the art looked already great. As I wrote, Angel looks super cute. I also liked that there are point and click passages even if they are not implemented yet.
As for the chat interface, I think it was done very well. My only advice would be to be careful that it does not overstay its welcome. Ultimately seeing actual sprites with expressions is more fun than a chat interface.
The story hook absolutely works. I would have loved to play more.
Great work. I am looking forward to more.