This is a fun political game (almost an oxymoron, I know!). It doesn't take up much of your time and you can learn stuff while playing. It's also a browser based text game, so there's no downloading anything!
You basicly start off by making up a name for your country and picking a few starting characteristics for how you want your government run. Every day you are presented with atleast one issue that needs resolving. It gives you choices on actions to take. After the new legislation is passed (usually takes 1 day after you choose an action) the description for your country is updated. Your choices on different issues effects everything from the economy to the freedoms of your people.
It's a simple, yet addictive game I came across a few years back, but have only recently rediscovered it. Give it a shot if it sounds at all interesting. You might just learn something.