The swirl technic is perfect with a competition pro joystick. I finished it plenty of times in several levels of difficulty. Those who can't play it correctly with a stick like the competition pro should stop playing shoot'em ups !!! More over i would add that the swirl technic is giving a feeling of perfect brutality, really in the state of mind of this wonderfull shooter. When all seems lost, surrounded of bullets or if you are in a middle of a zone with tons of destructible stuffs, WHAT A PLEASURE to launch a bomb in a brutal circle
. Of course with a joypad it is really difficult, that's why a joystick is highly advised !