Trevor Grimshaw, a lead artist for Planet Moon (when it was still Planet Moon) posted a bunch of concept art and screens from an "Unreleased Adventure Game" for Xbox 360, which Superannuation identified as a "first-party Kinect game" called My Amazing Story. That title does appear on the artist's resume, and the screenshots have "MAS" in their filenames, so it's a reasonably safe assumption.
The project, an action-adventure game, featured creepymonsters, various suits that the player could wear to gain powers -- including spacesuits and some kind of cat costume -- and cute Kinect integration in the form of "postcards."
Given that there's no Kinect-based action game like this on the market now, it's disheartening to learn of this one only after it was cancelled.
Update: The site is now locked to "invited readers only." We've also removed the header image at Trevor's request.