Part public art project, part video game, Lummo Blocks has taken over the Plaza de Las Letras. Basically Tetris writ large, two players shuffle horizontally in front of the billboard-sized display: one controls the trajectory of the game piece, while the other rotates it into place. The goal of the designers, MediaLab Prado, is to "creat[e] an interaction between the passersby and the public space of the plaza." Works for us! Madrid: we are officially jealous. Video after the break.