In this two-player abstract, players try to place tiles in an arrangement of 4-in-a-row or a 2x2 square — one player goes for shapes, the other is using colors. There are three shapes in three colors, 54 tiles total, one shape per tile. The board is a tilted easel; you slide your tile down one of the 7 grooves till it reaches the lowest available spot. After that it can't be moved. The four-in-a-row may be vertical, horizontal or diagonal. The trick is to concentrate on your objective (color or shape) while keeping an eye on what your move does for your opponent. The first player to complete a row or square of a common color or shape is the winner.