Video made for www.retrozentrale.net / Read the full article about the Vectrex console there. (German language).
Watch the cheat at 00:56. With this you lose a life, but score and difficulty is increasing a lot. (You can do this twice a game, but then the difficulty will be unplayable high). For this cheat, place the "cage" or the "grate" as left as possible on the screen. Note: Cheat or a bug ?