Petris is a new tiling game in the style of the 80's. Stripes (rectangles) fall from the sky, They can be horizontal or vertical stripes. Each 3 strips, from the same type, form a square. You can Not combine both horizontal and vertical stripes into a square. Rotate the shapes as they fall down, and move them left or right. The goal is to create as many lines as you can in the game. When you have 10 horizontal full squares - that is a full line. The line will be taken off and anything above it will fall down. Your aim is to make a much lines as possible, as you progress the game will be faster and faster. If there is no space for more stripes to fall - the game is over.