Pyrastak

Pyrastak is a single-player, freeware, falling block puzzle game in which both the colour and the shape on the block are important. Players start with a pyramid of blocks and more blocks fall from the top of the screen.

The object is to create a series of three horizontal blocks in which either the colour or the shape match - the matching blocks then disappear and the player scores points. Awkward blocks can be zapped by clicking on them but the player only has a limited amount of shots in their arsenal - though more can be earned by creating lines of three blocks. Clicking in the general game area toggles the direction of gravity causing the falling blocks to fall to the left or right.