Good game of the nonce: Memohuntress

MemoHuntress takes the familiar "click on the hidden object" concept and translates it to a platformer with numerous parallax layers that can hide the objects you're looking for as you run around the screen. Each multilayered level is a beautiful work of art expressing a lively world inspired by classical Japanese art. The game is really an interactive art piece with a game mechanic to prod you into looking at the whole thing. If it wasn't cool enough already, the developers added Vinnie Veritas artwork to the backgrounds.

The game takes an hour or two to play.