Very addictive puzzle game where you must match four our more atoms to clear the board. As you move each atom, several more appear. You can make lines horizontal, vertical, and diagnol, but atoms cannot move vertically. The path must be cleared to move from one spot to another.

Tip: When a line is cleared, no new pieces show up at that turn. Also, because the path must be cleared, consider carefully how to construct a line (often an in between piece is the best final piece).