In Boom Tapper your job is to eliminate all of the blocks onscreen by detonating specific blocks. This will in turn destroy any blocks surrounding them. There's not much more information currently known about the title at this point since the official web site is completely in Japanese.
We'll have more information on Boom Tapper, as well as any official word of a possible release outside of Japan as it becomes available.
For more information, check out: Official Site