That's incredible what Sarah Jane Avory can get from a C=64.
Zeta Wing would be a great 1980s Arcade Game, the one you could find in a bar or in an arcade room. The game itself is really over the limit I thought it could be achievied with a Commodore 64 (not to mention the music and FX). Absolutely amazing, with lots of monsters and boss and a background that keep changing. Simply awesome and a very, very enjoyable game. Congrats Sarah!