This hack provides 3 launchers. Both players share left stick to move, and left/down/right on the right stick to fire (trackball+Starplex button controller should make a good combo). The left stick fire button will pause the game at any point. Includes NTSC/PAL switching via the B&W switch (w/7800 autodetect), and is Supercharger-compatable.
Full list of changes listed in the assembly file
Buglist:
When beginning a 2-player game, "PLAYER2" will flash momentarily before it change