Абсолютрикс, pronounced Absolutrix in English, is a tetris clone developed by the Ukrainian game company Absolutist. You can download it from here http://playmap.ru/smallgames/puzzle/4237-absolyutriks.html, although it is a 30 minute limited trial. There is also a port for it for Windows Mobile which is slightly different like the blockskin for example, but otherwise basically identical. The one I'm playing now is the PC version. Associated Jstris skin: https://i.imgur.com/shVza6x.png (#1696 in Jstris Customization Database)