The game is notorious for requiring players to have the twitchreflexes of a methed - up cat, as one small mistake and your little Meat Boy ends up splattered all over the screen, forcing you to try again all the way from the beginning.
The Geometry Wars series favour twitchreflexesover everything else and soon you'll find yourself mentally switching off and entering «The Zone» where you basically rely upon instinct and nothing more.