Thread about porting X68000 games to the Atari Falcon: http://www.atari-forum.com/viewtopic.php?t=24111 (bullet hell shoot-em-up video on page 19)
(Atari Falcon: https://en.wikipedia.org/wiki/Atari_Falcon - it's quite a lot better than the original ST, but still doesn't have sprites or multiple playfields)