Never heard of this game before and bought it when it was on sale for $2.99 for my PSP Go.
It's a bullet hell game, that just means it's difficult and unless you got some great hand-eye coordination, you won't get very far.
You get a choice of planes but it's just mostly window dressing. You get 2 lives and power ups that offer you protection.
Man, it's difficult. But it's still fun.
There's a top 10 list for high scores and while you have unlimited continues, once you use a continue, your score resets.
If you're easily frustrated, this isn't the game for you.
Probably my biggest gripe is that when you die so often in a game, it'd nice if you could re-start right away but there's a bit of a wait for the next go, not long but that's a minor quibble.
A nice addition to the PSP Go library if you like difficult shooters.