(Requires Shockwave Player 11 from Adobe. When I ran the teaser app on my Mac laptop, it told me this and then sent my web browser to get Shockwave Player 10, which was confusing and unhelpful. Go to Adobe's site and get it directly.)
EDIT-ADD: The web site says the full game will be out in "early summer" -- he hopes.
A friend comments that one of the early puzzles is unduly hard if you're using a trackpad (as opposed to a mouse). I believe him. This is primarily a game of word and image puzzles, but -- as with Johnson's earlier games -- there are some click-fast elements.