There were no amusement arcades in East Germany so these robust Poly Play machines were found in municipal buildings, leisure centres and swimming pools, and offered seven or eight simple games. In the mid 1980's, Westerners would have been enjoying 'beat 'em up' games such as Streetfighters or Super Mario Brothers. In stark contrast, these simple games included a variation of Pacman called 'Hare and Wolf', car-racing, ski-ing (similar to ZX 81 games), and Carnival (shooting ducks). Westerners may find it harder to relate to games such as a man chasing butterflies or Deerhunt, which may have a cultural significance for East Germans. Another game, 'Catch the drips in a bucket or drown', makes one wonder if the residents of state-owned apartments ever found themselves in a similar predicament!
Here's a BBC news story about it, in which they amusingly misspell Schiessbude as Scheissbude and come to the conclusion that it had a game named "crap booth". If you can't make it to Swindon, you can play it on MAME.