Frac4D

What is the essence of the game Frac4D? This is a typical 3D Tetris, to which the fourth dimension is “screwed”. Figures of different sizes and shapes fall inside the familiar 3D tetris space 4x4x13. But this space is four-dimensional. It has one more independent coordinate. On the screen, the game space is repeated three more times, then this tetris is already described by the formula (4x4x13) x4. This is the 3D projection of the 4D space of the game.