i think that to make full use of the bomb balls you have to shoot at the walls.
Viewing post in Aphrodite's Alchemist [Abandoned] comments
Well, plus a lot of Suika games just kinda give up on physics after a while to save on performance, or the balls just get too packed to really move much.
I played one Suika game once that had it so every run of the game gave you like 3 screen shakes you could use whenever, and if you used it while the board was pretty clear, it'd work great, but if you used it when the box was half-full, nothing really happens, heh.