Great concept, solid execution.
Feels really bad and frustrating when you shoot one of the ships that's become a pickup and it disappears though, especially since your glued ships autofire. going all the way to the top of the screen to pick up a ship also feels like more trouble than its worth honestly, maybe the green ships could drift down to the player? trade the risk of getting hit with the risk of not getting the power up if it goes off the bottom of the screen.