Double Force

I'm flying shooter that uses the two planes alternately.Tip.When the gauge alternately by replacing the plane, please recover HP.  Select a myriad much you eat less items.items 1: 1 Can I upgrade missile eat the same thing once the item. Can I eat initialize another number.Item 2: Same as aboveItem 3: Same as aboveP Item: Can I upgrade power-ups bullet.Skull Item: Can I upgrade the power-down bullet down. Andoeyo eat.Coin Item: I can eat a lot of gold increased use of auxiliary gas.S Item: special moves activated.