Clickistan is donationware, of a sort; it urges you, from time to time, to donate to the annual fund for the Whitney Museum, which commissioned it.
It's an art game created by a Ubermorgen, a duo of Austrian digital artists. You would think, given these facts, that it would suck, but actually, it's kind of engaging. Not coherent, mind you, but engaging.
In each level, you click on stuff while chiptunes play. A score at screen bottom is about the only thing that the levels have in common; it increases, somewhat mysteriously, when you click on the right things, whatever they may be. At some point, text appears telling you that the level is "extremely complete," and you should click to continue.
In short, it's chaotic, there's really no motivation to play other than to see what comes next and for the basically irrelevant non-thrill of maximizing a pointless score; but visually, it's cool, and the chiptunes are fun, and it's at least as much of an enjoyable timewaster as most of the stuff we point to.
(Via Grand Text Auto.)