The best of the Live Arcade game available at launch.
Controls are simple enough; left joystick flies your little spaceship, right joystick directs your fire in any direction. Sounds easy enough, right? Well, at first it takes a little getting used to. Once you get the hang of shooting and moving you still won't have the game mastered, though. It starts off slow and builds to a frantic pace of having the screen illuminated by explosions, enemies, your fire, the 'floor' vibrating...all coming together in a graphical cacophony at times.
When the action gets heavy you have a limited supply of bombs that take out all the enemies on screen at that time. While a great lifesaver, it doesn't always end up foolproof. There have been several times where I think I'm in the clear only to fly right into an enemy that was materializing after I detonated my bomb.
The Xbox Achievement system is a great touch but the goals for the game seem astronomically high. So far I've only unlocked 2, and I doubt if I will ever get more than 4 out of the 20. Despite the difficulty, I still find myself striving to attain them, which is a good thing.
Overall I think I've played this game almost as much as some of the retail launch games. For $5 you cannot beat the amount of fun that this game supplies you with.
As of this writing my high score is only 195k.