Geometry Wars has just gone universal.
It's the game that spawned the whole dual stick genre on the original xbox as a loading game (you ware able to play this during loading times of a racing game). It's the only time that people were unhappy when the load has finished When the x360 was released with it's online store criterion released the game as a standalone and it was a bug smash hit. Got more buys than the other release titles and was for many the first system seller on the 360.
Long story short: I can everyone only encourage to get it. Especially since they lowered the price to $4.99.