A Tetris-like puzzle game featuring popular characters from many Capcom games.
Colored gems fall from the top of the screen in pairs, but this time lining up those of the same color is not enough. To break the gems and punish your opponent with counter gems you have to place a crash gem of the same color next to the gems. If you make a block of gems of the same color they'll fuse, forming a power gem. Breaking a power gem sends more counter gems to your opponent than breaking the same amount of gems in some other configuration. But the ultimate attack is breaking power gems in chain.
There is a remixed vocal version of Sakura's theme song available as a prize in Street Puzzle mode. The song is called "I Want You to Know" and (I think) is performed by the seiyuu (voice actor) for Sakura in Street Fighter Zero 2. I believe that in order to open this song, you have to defeat Sakura in SP mode a couple of times first.