What are your favorite time wasting Internet games?

I have a few.

Here's one I really like.

http://www.physicsgames.net/game/Demolition_City.html

and another

http://balldroppings.com/js/?1

 

mush.twinoid.com is one of the best games I've played and it's pretty open in that you can play it as much or as little as you want even though it's an online game. It's basically like mafia if you've ever played that with people.

As for higher end games, I really enjoyed the new XCom.

 

I love playing those escape games.