It is a Bullet Hell shoot 'em up, a type of shoot 'em up characterized by high bullet density.
To counter this, your hitbox -- the area of your ship that can be hit by bullets -- is a mere 2 pixel by 2 pixel square. Dodging all those bullets is easier than it looks ... though it can still be insanely hard.
In Barrage, there is only one boss enemy that you have to kill, though it never seems to want to go down no matter how much you shoot it. Instead of just dying when its health runs out, it switches to a stronger attack and refills its health bar. It will die eventually, but be prepared for a long battle...
You can easily rack up tons of extra lives, but don't expect to be able to just ram through easily. On easy or normal mode, you might be able to do it, but hard mode is a completely different story.
Barrage also features a practice mode where you can practice killing a specific attack pattern ... it's best that you use it.
· OS: Win XP