This is a pretty lightweight 'review' - this is not so much a game as an experience. I won't get into the technical breakdowns because quite frankly - most of them do not apply to this particular title. This is the only downloaded title we have acquired to date, and this one was at the request of my least game-playing kid, my oldest daughter.
The premise is sort of interesting - you use the move controller as a virtual pen/paintbrush/artistic 'wand' and draw on the screen. You can overlap/draw on images, and you can play it against different audio tracks. The number of tools are cool, and you can do quite a bit with it - including making movies to share or images to save. It works off of the Playstation Eye, which - as always - looks kind of like crap, though.
I'll be honest - it was more of a short diversion for me. There are some challenges set to music where you try to draw certain patterns out weighed against accuracy and time, and some easy trophies to get, but if I'm going to work with images or video, I'm going to use actual computer software where the results are something I would actually want someone to see. The kids seem to enjoy it from time-to-time, but it's a fifteen minute novelty, and as such would have had a lot more value at $5 than $10. I was not real impressed with the title, and even my oldest -the one who wanted it - has only played it a couple of dozen times so far. She seems to enjoy it, but your mileage will no doubt vary.