As of the March 30 2015 update to Geometry Wars 3D Evolved, that game includes a classic mode which is functionally identical to this. As a result, this game is completely obsolete and the new version is by far the better value. Buy that instead. Original review below.
I wouldn't say GW is a *bad* game per se, but one of the most entertaining aspects of the xbox 360 version was the leaderboard system. Since this game only has local (offline) leaderboards, there isn't much to propel you to get a braggable high score if you don't have friends around to play it. It isn't really Bizarre Creation's fault that there isn't steamworks integration here, since they are closed down, but that was probably the second most important feature beside the main game.
That being said, the core gameplay is exactly the same as the xbox 360 version and there is full controller support, which is nice.