It's a ripoff. A bad one.
This is that pacific fighters game submitted a while back, downgraded!
If you're gonna downgrade somthing, dont do it to a fantastic game.
The game it's self, needs a couple of more planes to choose from, a PERMANANT upgrade shoppe, and more lives per level.
And, seccondary weapons.
Untill it's fixed, you get a zero, my friend.