Why play Tetris on your television when you can dominate on a building?
The invaders come out of the wall cracks and move down to the ground. The player has to move left or right to control the motion of the aircraft. Whenever the player jumps, the aircraft shoots out a bullet
Thus the game is projected on a building and the limits of that building are becoming the limits of the game area. The ball projected on the building bounces along the limits of the walls. The software is also using the windows as an obstacles for the game