Hatris

In this puzzle game, players have to stack six different hats, two at a time, onto six different and strange-looking mannequin heads. Players begin by choosing the starting difficulty level as well as the starting pile of hats. As the hats fall down, you can swap which side they are on to try and stack the similar hats together. Once five identical hats are stacked on the same column (head), they will disappear to allow for more room.