Check out this Colecovision-style Flash game from PixelJam, the latest installment in Adult Swim's 8-bit Rejects collection. You move these blocky pixels around and make other pixels hit each other. It's the most fun you'll have all day. Or maybe not, since today is Friday. My high score is a gizzillion points, so don't bother trying to beat it or anything.
games.adultswim.com/mountain-maniac-twitchy-online-game.html
 |  |  |  |
Oh. . . you can manipulate the boulders movement.
I was just sitting there watching it fall, first time playing the game.