Oh wait, I stand corrected.
Dogyuun does work!
With sound, in fact!
ALRIGHT.
DOGYUUN.
AWESOME COOL SHIT.
SO YOU HAVE A SHIP.
AND IT SPAMS LASERS.
BUT IF YOU PLAY 2P, YOU CAN COMBINE YOUR SHIPS INTO ONE BIG LASER SPAMMING RAPESHIP.
Co-op play would definitely be fun. One ship has one powerup, another has one other, depending on how you dock (and consequently who gets control) you can have a powered-up version of one of those two shots.