Go Doeo!
Inching into the day after accidentally not remembering to sleep, Simon Parkin points me at Doeo - a piece of flash-distraction-science which has helped me gently reintroduce myself to life. It's basically whack-a-mole with Katamari Damacy's aesthetics - the titular Doeos appear and you have to move your mouse over them. It's as simple as mechanic as you'll find, but it goes about its task of making Doeos appear from unexpected places with as much imagination as you could wish (And with hypercute anarchistic tendencies). Doeos destroy cities! Doeos decapitate people! Giant sinister Doeos staring, ever staring at us! Who will save us from the Doeos?
(Answer: You)