The game uses raster timings for blanking sprites, if you run it on anything other than a 3.5mhz processor, it won't display correctly.
but the video shows it running on sim coupe at 2.4 times full 6mhz with external 1mb ram in snaper emulator from velesoft website
wanna buy roust asteroids donkey kong and kung fu master but I'm not paying patreon or in dollars