You don’t know Geometry Wars? Well… take a look:

As you can see: It’s colorful, it’s action, it’s real fun to play. I am playing it from time to time and my high-score is around 120.000 points… which is pathetic compared to the guy that created this video:
Just in case you haven’t noticed: more than 16.6 MILLION points…in one sitting.
Source: http://www.geometrywars.com