HAYABUSA Make Seven

This is a variant of tetris game with pieces each consisting of three blocks.

Each block has each value from 1 to 6.
If the sum of adjoined blocks becomes 7, the blocks will disappear.

In two players mode, you can attack the opponent by block 7, when you made consecutive scoring.
Only by arrangeing three or more blocks vertically or horizontally, you can erase it.

Of course, when the well is filled up, the game will be over.
It's harder than it looks, because speed of falling becomes faster and faster as block disappears.