In MAME, Puzzle Bobble 2, 3 and 4 all show as "yes" for trackball support, and have in-game settings for analog control, and in Mame32 Plus, they're listed in the DIAL control category. I have "Enable mouse input" checked in the game properties. In the game, the bubble shooter is controlled only by the directional input (mouse has no effect). I looked in the Service menu, and there's settings for a number of different things, but nothing related to input. Am I missing something?
Thanks!