Ptakovina game was created in 2017 as part of developers competition published at www.high-voltage.cz. The game consists of three Tetris variations.
The target of Addtris game is to put number above two others so that value of number at the top is sum of two underlying. The target of Tetris game is to fill and clear horizontal lines by manipulating of falling objects. The target of X-Tris game is to fill and clear horizontal lines by manipulating of falling objects. Line is cleared at the moment when every square of the row is filled.