Peggle, a game similar to that of Japanese pachinko machines where you release a ball from the top of the screen and watch it bounce off of as many pegs as you can before it reaches the bottom. The concept, although very simple, makes for a great game. Before you know it, your plan to play for only 20 minutes will last for around 2 hours.
I'm not much of a casual gamer but I actually kind of enjoyed it. Its extremely simple premise to bounce a ball off as many pegs is actually kind of new and enjoyable. The cutesy art direction and excellent sound effects also help with the addictive factor of the game. Although it sounds simple, the levels can get extremely tough. I unfortunately did not have the patience to complete the bonus levels which require ridiculous challenges such as clearing all pegs off the screen or scoring a ridiculous amount of points, but if you're the kind of person who enjoys such challenges then by all means please try, as Peggle can make time fly extremely fast when waiting for a friend or waiting for a flight.