I liked the art style and the idea of this game, or the idea of the main game, at least. I'll probably give it a try when it's ready :D
Well, about this prequel/prologue, I loved the artworks and the character design in general. I wish I could see some character portraits in the message boxer, instead of blackscreen + text. It's a pity! The gameplay is kinda ok, but maybe it can become monotonous pretty quickly. Perhaps you should add some more depth to it? I guess you'll do it for the real game! However I'm invested in the characters, and I'm really curious about the main game! Good luck!