The games @ cantyouseeimbusy.com are perfect for work if you have nothing to do but need to look busy, these games are cleverly designed to look just like a spreadsheet and when you pause during game play the game disappears and reverts to looking like a normal spreadsheet. They have three games on the site Breakdown, leadership, and cut costs, If you have some time to waste check em out.
Here is the link to there work safe game page with direct links to the games. http://cantyouseeimbusy.com/games/ 
