You can never have enough colorful block/ball puzzlers.  Flashxed, a clone of the Palm OS game Vexed, offers a huge assortment of puzzles where you moves various blocks around trying to clear the board.  Be care though, you only have a limited number of moves, making for a great challenge.  And with dozens of prepared puzzles, you’ve got lots to distract you from things like work and responsibility.

Geek-Out Game: Flashxed