Brizzo extracted the sound rom from the Bubble Bobble prototype and virtually all the music is different. Try not to shit yourself. If you do shit yourself, you're never going to get that out so first thing is order a new computer chair online.
coolmod dumped floppy disk updates for Hydro Thunder, looks like they update the original release to the version we have in mame (1.01B).
Brizzo dumped alt versions of Wai Wai Drive and Block Pong-Pong lent from Fabrice Arzeno . I think the previous Block Pong-Pong dump turned out to be the SC / Shopping Center version.