As long as this isn't replacing a demo, this is a good idea. It's free beta-testing on a much larger scale than an indie can afford. The one thing that could go horrifically wrong though, is terrible word of mouth. It'll be interesting to see how this idea pans out. From the video it looks like the baby Japan rpg formula where everyone is a cartoon character. I've never bought into those types of games, but they're immensely popular.