Interesting Concept, but not quite a full-on painter's app – Adobe PaintCan Review

This app has cool effects, but as far as painting apps go I would've expected more from Adobe. More brushes, more control over the colors and the way they blend would be nice. That said, despite not meeting my expectations, this app does have its place - these limitations can make it possible to play around more freely, and if you sit back and observe you might even pick up a few techniques. Because of that I think it's great for whenever you get "artist's block", but if you're looking for a painting app in the more conventional sense, you might look elsewhere.
Review by A.T. Raine on Adobe PaintCan.