‘NO MOVES BACK’ WHILE COMPOSER/LIBRETTIST AND ALSO PLAYWRIGHT MARTIN HALPERN was convalescing from an operation, a group of his Brooklyn Heights-Hills-Slope friends last Thursday attended a performance of his play, No Moves Back, in the small Roy Arias’ Payan Theatre at 300 West 43rd Street. Very different from Halpern’s opera, The Siege of Troy, staged in..