I'll be nice & give some advice. ^_^

You'll notice that if you shoot for a while your weapon starts to go crap, that's a hint to stop shooting. When you stop you'll notice a flash around your plane, and that will reflect any bullets that touch it.

The longer you hold the fire button the bigger the reflect when you let go.

Reflected bullets (the purple ones) kill enemies. So if you get surrounded let go of fire & send the bullets flying back.