Hatris

Hatris is a puzzle video game developed by Alexey Pajitnov, creator of famous video game Tetris. In Hatris, the falling blocks of Tetris are replaced by falling hats which are top hats, cowboy hats, baseball caps, derbys, party hats and crowns. The setting is a hat factory, where hats are dropped down from a conveyor belt two at a time and must be stacked on one of six mannequin heads.